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Don't Trust The Maze Mac OS

Don't Trust The Maze Mac OS

June 01 2021

Don't Trust The Maze Mac OS

Acknowledgement: This assignment is based closely on the one created by Dan Klein and John DeNero that was given as part of the programming assignments ofBerkeley's CS188 course.We thank Dan and John for sharing it with us and for their permission to use it as a part of our course.

Insert the Mac OS X installation disc that came with your computer or with your Mac OS X retail package. Double-click the Optional Installs folder, and then double-click the Optional Installs package. A package has an icon that looks like an open box. Follow the onscreen instructions. When Apple released Mac OS X 10.7 Lion last month, the company did a very unusual thing: It made it an online-only download. That freaked out a lot of people who were afraid if something went. Your ClosestDotSearchAgent won't always find the shortest possible path through the maze. (If you don't understand why, ask a TA!) In fact, you can do better if you try. Mini Contest (2 points extra credit) Implement an ApproximateSearchAgent in searchAgents.py that finds a short path through the bigSearch layout. The three teams that find the.


Project 1: Search in Pacman

All those colored walls,
Mazes give Pacman the blues,
So teach him to search.

Introduction

In this project, your Pacman agent will find paths through his maze world, both to reach a particular location and to collect food efficiently. You will build general search algorithms and apply them to Pacman scenarios.

The code for this project consists of several Python files, some of which you will need to read and understand in order to complete the assignment, and some of which you can ignore. You can download all the code and supporting files (including this description) as a zip archive.
Files you'll edit:
search.pyWhere all of your search algorithms will reside.
searchAgents.pyWhere all of your search-based agents will reside.
Files you might want to look at:
pacman.pyThe main file that runs Pacman games. This file describes a Pacman GameState type, which you use in this project.
game.pyThe logic behind how the Pacman world works. This file describes several supporting types like AgentState, Agent, Direction, and Grid.
util.pyUseful data structures for implementing search algorithms.
Supporting files you can ignore:
graphicsDisplay.pyGraphics for Pacman
graphicsUtils.pySupport for Pacman graphics
textDisplay.pyASCII graphics for Pacman
ghostAgents.pyAgents to control ghosts
keyboardAgents.pyKeyboard interfaces to control Pacman
layout.pyCode for reading layout files and storing their contents

What to submit: You will fill in portions of search.py and searchAgents.py during the assignment. These two files are the only .py files you should submit.

This assignment should be submitted with the assignment name cs343-1-search using these submission instructions.

Evaluation: Your code will be autograded for technicalcorrectness. Please do not change the names of any provided functions or classes within the code, or you will wreak havoc on the autograder. However, the correctness of your implementation -- not the autograder's output -- will be the final judge of your score. If necessary, we will review and grade assignments individually to ensure that you receive due credit for your work.

Academic Dishonesty: We will be checking your code against other submissions in the class for logical redundancy. If you copy someone else's code and submit it with minor changes, we will know. These cheat detectors are quite hard to fool, so please don't try. We trust you all to submit your own work only; please don't let us down. If you do, we will pursue the strongest consequences available to us.

Getting Help: You are not alone! If you find yourself stuck on something, contact the course staff for help. Office hours, discussion board, and the mailing list are there for your support; please use them. If you can't make our office hours, let us know and we will schedule more. We want these projects to be rewarding and instructional, not frustrating and demoralizing. But, we don't know when or how to help unless you ask. One more piece of advice: if you don't know what a variable does or what kind of values it takes, print it out.

Welcome to Pacman

After downloading the code (search.zip), unzipping it and changing to the search directory, you should be able to play a game of Pacman by typing the following at the command line:Pacman lives in a shiny blue world of twisting corridors and tasty round treats. Navigating this world efficiently will be Pacman's first step in mastering his domain.

The simplest agent in searchAgents.py is called the GoWestAgent, which always goes West (a trivial reflex agent). This agent can occasionally win:But, things get ugly for this agent when turning is required:Soon, your agent will solve not only tinyMaze, but any maze you want.Note that pacman.py supports a number of options that can each be expressed in a long way (e.g., --layout) or a short way (e.g., -l). You can see the list of all options and their default values via:Also, all of the commands that appear in this project also appear in commands.txt, for easy copying and pasting. In UNIX/Mac OS X, you can even run all these commands in order with bash commands.txt.

Finding a Fixed Food Dot using Search Algorithms

In searchAgents.py, you'll find a fully implemented SearchAgent, which plans out a path through Pacman's world and then executes that path step-by-step. The search algorithms for formulating a plan are not implemented -- that's your job. As you work through the following questions, you might need to refer to this glossary of objects in the code.First, test that the SearchAgent is working correctly by running:The command above tells the SearchAgent to use tinyMazeSearch as its search algorithm, which is implemented in search.py. Pacman should navigate the maze successfully.

Now it's time to write full-fledged generic search functions to help Pacman plan routes! Pseudocode for the search algorithms you'll write can be found in the lecture slides and textbook. Remember that a search node must contain not only a state but also the information necessary to reconstruct the path (plan) which gets to that state.

Important note: All of your search functions need to return a list of actions that will lead the agent from the start to the goal. These actions all have to be legal moves (valid directions, no moving through walls).

Hint: Each algorithm is very similar. Algorithms for DFS, BFS, UCS, and A* differ only in the details of how the fringe is managed. So, concentrate on getting DFS right and the rest should be relatively straightforward. Indeed, one possible implementation requires only a single generic search method which is configured with an algorithm-specific queuing strategy. (Your implementation need not be of this form to receive full credit).

Hint: Make sure to check out the Stack, Queue and PriorityQueue types provided to you in util.py!

Question 1 (2 points) Implement the depth-first search (DFS) algorithm in thedepthFirstSearch function in search.py. To make your algorithm complete, write the graph search version of DFS, which avoids expanding any already visited states (textbook section 3.3).

Your code should quickly find a solution for:The Pacman board will show an overlay of the states explored, and the order in which they were explored (brighter red means earlier exploration). Is the exploration order what you would have expected? Does Pacman actually go to all the explored squares on his way to the goal?

Hint: If you use a Stack as your data structure, the solution found by your DFS algorithm for mediumMaze should have a length of 130 (provided you push successors onto the fringe in the order provided by getSuccessors; you might get 244 if you push them in the reverse order). Is this a least cost solution? If not, think about what depth-first search is doing wrong.

Question 2 (1 point) Implement the breadth-first search (BFS) algorithm in thebreadthFirstSearch function in search.py. Again, write a graph search algorithm that avoids expanding any already visited states. Test your code the same way you did for depth-first search.Does BFS find a least cost solution? If not, check your implementation.

Hint: If Pacman moves too slowly for you, try the option --frameTime 0.

Note: If you've written your search code generically, your code should work equally well for the eight-puzzle search problem (textbook section 3.2) without any changes.

Varying the Cost Function

While BFS will find a fewest-actions path to the goal, we might want to find paths that are 'best' in other senses. Consider mediumDottedMaze and mediumScaryMaze. By changing the cost function, we can encourage Pacman to find different paths. For example, we can charge more for dangerous steps in ghost-ridden areas or less for steps in food-rich areas, and a rational Pacman agent should adjust its behavior in response.

Question 3 (2 points) Implement the uniform-cost graph search algorithm inthe uniformCostSearch function in search.py. You should now observe successful behavior in all three of the following layouts, where the agents below are all UCS agents that differ only in the cost function they use (the agents and cost functions are written for you):

Note: You should get very low and very high path costs for the StayEastSearchAgent and StayWestSearchAgent respectively, due to their exponential cost functions (see searchAgents.py for details).

A* search

Question 4 (3 points) Implement A* graph search in the empty function aStarSearch in search.py. A* takes a heuristic function as an argument. Heuristics take two argument: a state in the search problem (the main argument), and the problem itself (for reference information). The nullHeuristic heuristic function in search.py is a trivial example.

You can test your A* implementation on the original problem of finding a path through a maze to a fixed position using the Manhattan distance heuristic (implemented already as manhattanHeuristic in searchAgents.py). You should see that A* finds the optimal solution slightly faster than uniform cost search (about 549 vs. 620 search nodes expanded in our implementation, but ties in priority may make your numbers differ slightly). What happens on openMaze for the various search strategies?

Finding All the Corners

The real power of A* will only be apparent with a more challenging search problem. Now, it's time to formulate a new problem and design a heuristic for it.

In corner mazes, there are four dots, one in each corner. Our new search problem is to find the shortest path through the maze that touches all four corners (whether the maze actually has food there or not). Note that for some mazes like tinyCorners, the shortest path does not always go to the closest food first! Hint: the shortest path through tinyCorners takes 28 steps.

Question 5 (2 points) Implement the CornersProblem search problem in searchAgents.py. You will need to choose a state representation that encodes all the information necessary to detect whether all four corners have been reached. Now, your search agent should solve: To receive full credit, you need to define an abstract state representation that does not encode irrelevant information (like the position of ghosts, where extra food is, etc.). In particular, do not use a Pacman GameState as a search state. Your code will be very, very slow if you do (and also wrong).

Hint: The only parts of the game state you need to reference in your implementation are the starting Pacman position and the location of the four corners.

Don

Our implementation of breadthFirstSearch expands just under 2000 search nodes on mediumCorners. However, heuristics (used with A* search) can reduce the amount of searching required.

Question 6 (3 points) Implement a heuristic for the CornersProblem in cornersHeuristic. Grading: inadmissible heuristics will get no credit. 1 point for any admissible heuristic. 1 point for expanding fewer than 1600 nodes. 1 point for expanding fewer than 1200 nodes. Expand fewer than 800, and you're doing great!

Hint: Remember, heuristic functions just return numbers, which, to be admissible, must be lower bounds on the actual shortest path cost to the nearest goal.

Note:AStarCornersAgent is a shortcut for -p SearchAgent -a fn=aStarSearch,prob=CornersProblem,heuristic=cornersHeuristic.

Eating All The Dots

Now we'll solve a hard search problem: eating all the Pacman food in as few steps as possible. For this, we'll need a new search problem definition which formalizes the food-clearing problem: FoodSearchProblem in searchAgents.py (implemented for you). A solution is defined to be a path that collects all of the food in the Pacman world. For the present project, solutions do not take into account any ghosts or power pellets; solutions only depend on the placement of walls, regular food and Pacman. (Of course ghosts can ruin the execution of a solution! We'll get to that in the next project.) If you have written your general search methods correctly, A* with a null heuristic (equivalent to uniform-cost search) should quickly find an optimal solution to testSearch with no code change on your part (total cost of 7).

Note:AStarFoodSearchAgent is a shortcut for -p SearchAgent -a fn=astar,prob=FoodSearchProblem,heuristic=foodHeuristic.

You should find that UCS starts to slow down even for the seemingly simple tinySearch. As a reference, our implementation takes 2.5 seconds to find a path of length 27 after expanding 4902 search nodes.

Question 7 (5 points) Fill in foodHeuristic in searchAgents.py with a consistent heuristic for the FoodSearchProblem. Try your agent on the trickySearch board:Our UCS agent finds the optimal solution in about 13 seconds, exploring over 16,000 nodes. If your heuristic is admissible, you will receive the following score, depending on how many nodes your heuristic expands.
Fewer nodes than:Points
150001
120002
90003 (medium)
70004 (hard)

If your heuristic is inadmissible, you will receive no credit, so be careful! Think through admissibility carefully, as inadmissible heuristics may manage to produce fast searches and even optimal paths. Can you solve mediumSearch in a short time? If so, we're either very, very impressed, or your heuristic is inadmissible.

Admissibility vs. Consistency?Technically, admissibility isn't enough to guarantee correctness in graph search -- you need the stronger condition of consistency. For a heuristic to be consistent, it must hold that if an action has cost c, then taking that action can only cause a drop in heuristic of at most c. If your heuristic is not only admissible, but also consistent, you will receive 1 additional point for this question.

Almost always, admissible heuristics are also consistent, especially if they are derived from problem relaxations. Therefore it is probably easiest to start out by brainstorming admissible heuristics. Once you have an admissible heuristic that works well, you can check whether it is indeed consistent, too. Inconsistency can sometimes be detected by verifying that your returned solutions are non-decreasing in f-value. Morevoer, if UCS and A* ever return paths of different lengths, your heuristic is inconsistent (and inadmissible, too). This stuff is tricky. If you need help, don't hesitate to ask the course staff!

Suboptimal Search

Sometimes, even with A* and a good heuristic, finding the optimal path through all the dots is hard. In these cases, we'd still like to find a reasonably good path, quickly. In this section, you'll write an agent that always eats the closest dot. ClosestDotSearchAgent is implemented for you in searchAgents.py, but it's missing a key function that finds a path to the closest dot.

Question 8 (2 points) Implement the function findPathToClosestDot in searchAgents.py. Our agent solves this maze (suboptimally!) in under a second with a path cost of 350:

Hint: The quickest way to complete findPathToClosestDot is to fill in the AnyFoodSearchProblem, which is missing its goal test. Then, solve that problem with an appropriate search function. The solution should be very short!

Your ClosestDotSearchAgent won't always find the shortest possible path through the maze. (If you don't understand why, ask a TA!) In fact, you can do better if you try.

Mini Contest (2 points extra credit) Implement an ApproximateSearchAgent in searchAgents.py that finds a short path through the bigSearch layout. The three teams that find the shortest path using no more than 30 seconds of computation will receive 2 extra credit points and an in-class demonstration of their brilliant Pacman agents. We will time your agent using the no graphics option -q, and it must complete in under 30 seconds on our grading machines. Please describe what your agent is doing in a comment! We reserve the right to give additional extra credit to creative solutions, even if they don't work that well. Don't hard-code the path, of course.

Object Glossary

Here's a glossary of the key objects in the code base related to search problems, for your reference:

SearchProblem (search.py)
A SearchProblem is an abstract object that represents the state space, successor function, costs, and goal state of a problem. You will interact with any SearchProblem only through the methods defined at the top of search.py
PositionSearchProblem (searchAgents.py)
A specific type of SearchProblem that you will be working with --- it corresponds to searching for a single pellet in a maze.
CornersProblem (searchAgents.py)
A specific type of SearchProblem that you will define --- it corresponds to searching for a path through all four corners of a maze.
FoodSearchProblem (searchAgents.py)
A specific type of SearchProblem that you will be working with --- it corresponds to searching for a way to eat all the pellets in a maze.
Search Function
A search function is a function which takes an instance of SearchProblem as a parameter, runs some algorithm, and returns a sequence of actions that lead to a goal. Example of search functions are depthFirstSearch and breadthFirstSearch, which you have to write. You are provided tinyMazeSearch which is a very bad search function that only works correctly on tinyMaze
SearchAgent
SearchAgent is is a class which implements an Agent (an object that interacts with the world) and does its planning through a search function. The SearchAgent first uses the search function provided to make a plan of actions to take to reach the goal state, and then executes the actions one at a time.

Things to check first

Check if you still need help after each of the steps below.

  1. Check the system status of iCloud Contacts, Calendars, and Reminders.
  2. If a reminder isn't showing up on some devices, make sure that you're running the latest iOS, iPadOS, or macOS on each device. Upgraded reminders and shared reminders in iOS 13 or later or macOS Catalina or later aren't compatible with earlier versions of iOS or macOS. Learn more.
  3. Make sure that the date and time settings on your iPhone, iPad, iPod touch, Mac, or PC are correct.
  4. Make sure that you're signed in to iCloud with the same Apple ID on all of your devices. Then, check that you turned on Contacts, Calendars, and Reminders* in your iCloud settings.
  5. Check your Internet connection. Open Safari and go to www.apple.com. If you can’t open the page, learn what to do.
  6. Check that you can access secure websites. Open Safari and go to your Apple ID account page. If the website won't open, contact your Internet service provider for help.
  7. Make sure that you haven't exceeded your iCloud storage limit or the storage limits for iCloud Contacts, Calendars, and Reminders.

* On a PC with Outlook 2016 or later, Reminders are called Tasks.

Try the steps for your device

If you still need help, try the steps for your device below.

iOS 13 and iPadOS or later

After each step, check your contacts, calendars, or reminders.

Refresh your contacts and calendars

To refresh your contacts, open Contacts and swipe down on the list. To refresh your contact groups, tap Groups in the upper-left corner, then swipe down on the list.

To refresh your calendars:

  1. Open the Calendar app.
  2. Tap the Calendars tab.
  3. Swipe down on the list to refresh your events.

Check your app settings

  1. Make sure you turned on Contacts, Calendars, and Reminders on your device.
  2. If you use multiple groups or accounts in the Contacts or Calendars app, make sure your iCloud Contacts and Calendars are set to appear:
    • Open the Contacts app and tap Groups in the upper-left corner. Make sure that All iCloud is selected.
    • Open the Calendar app and tap the Calendars tab. Make sure that all iCloud calendars are selected.
  3. Change how often your calendars update:
    1. Tap Settings, then Calendar.
    2. Tap Sync.
    3. If All Events is selected, choose a specific timeframe instead, like Events 1 Month Back. If a specific timeframe is selected, choose All Events instead.
    4. Return to your Home screen.
    5. Wait a few minutes, then open the Calendar app. Tap the Calendars tab, and swipe down to refresh.

Since the iCloud Birthdays calendar updates daily, you might not see changes to birthdays in the Calendars app until the next day.

Set iCloud Contacts, Calendars, or Reminders as your default

If your contacts, calendars, and reminders are in iCloud, then iCloud automatically updates your information. If your information is in a third-party account, like Google or Yahoo, you can change your default account to iCloud. Changing your default account to iCloud won't move your existing information from a third-party service to iCloud.

Contacts

To see which account your contacts are in:

  1. Open the Contacts app and tap Groups in the upper-left corner.
  2. Deselect the All [account] option for any third-party account, like Gmail or Yahoo.
  3. Make sure All iCloud is selected.
  4. Tap Done to see your list of contacts. If you don't see the contact you're looking for, it's stored in another account.
  5. If you have a copy of your contacts from a third-party service in vCard format version 3.0 or later, you can import the contacts into iCloud.

Set iCloud as the default account for your contacts:

  1. Tap Settings, then Contacts.
  2. Tap Default Account.
  3. Select iCloud.

Calendars and Reminders

To see which account your calendars are in, open the Calendar app, then tap the Calendars tab.

Set an iCloud calendar as the default calendar:

  1. Tap Settings, then Calendar.
  2. Tap Default Calendar.
  3. Tap a calendar under iCloud to make it your default.

Set an iCloud reminders list as the default list:

  1. Tap Settings, then Reminders.
  2. Tap Default List.
  3. Tap a list under iCloud to make it your default.

Restart the Contacts, Calendar, or Reminders app

  1. Close the app.
  2. Return to your Home screen.
  3. Wait a minute, then open the app again.

Turn off iCloud Contacts, Calendar, or Reminders and turn it back on

  1. Tap Settings > [your name] > iCloud.
  2. Slide to turn off Contacts, Calendars, and Reminders.*
  3. If you see your calendars or reminders on iCloud.com or any of your devices, you can choose Delete from My [device]. If not, choose Keep on My [device].
  4. Wait a few minutes, then turn on Contacts, Calendar, or Reminders again.

* Local reminders will be deleted from your device, but your information won't be deleted from iCloud. Once you turn Reminders back on, your reminders will be re-synced to your device.

Restart your iPhone, iPad, or iPod touch

Here's how to restart your iPhone, iPad, or iPod touch.

iOS 12

After each step, check your contacts, calendars, or reminders.

Refresh your contacts, calendars, and reminders

To refresh your contacts, open Contacts and swipe down on the list. To refresh your contact groups, tap Groups in the upper-left corner, then swipe down on the list.

To refresh your calendars and reminders:

  1. Open the Calendar app.
  2. Tap the Calendars tab.
  3. Swipe down on the list to refresh your events and reminders.

Check your app settings

  1. Make sure you turned on Contacts, Calendars, and Reminders on your device.
  2. If you use multiple groups or accounts in the Contacts or Calendars app, make sure that your iCloud Contacts and Calendars are set to appear:
    • Open the Contacts app and tap Groups in the upper-left corner. Make sure that All iCloud is selected.
    • Open the Calendar app and tap the Calendars tab. Make sure that All iCloud is selected.
  3. Change how often your calendars and reminders update:
    1. Tap Settings > Calendar, or tap Settings > Reminders.
    2. Tap Sync.
    3. If All Events or All Reminders is selected, choose a specific timeframe instead, like Events or Reminders 1 Month Back. If a specific timeframe is selected, choose All Events or All Reminders instead.
    4. Press the Home button.
    5. Wait a few minutes. Open the Calendar app, tap the Calendars tab, and swipe down to refresh.

Since the iCloud Birthdays calendar updates daily, you might not see changes to birthdays in the Calendars app until the next day.

Set iCloud Contacts, Calendars, or Reminders as your default

If your contacts, calendars, and reminders are in iCloud, then iCloud automatically updates your information. See if your information is in iCloud or a third-party account, like Google or Yahoo. Then change your default account to iCloud.

Contacts

See which account your contacts are in:

  1. Open the Contacts app and tap Groups in the upper-left corner.
  2. Deselect the All [account] option for any third-party account, like Gmail or Yahoo.
  3. Make sure All iCloud is selected.
  4. Tap Done to see your list of contacts. If you don't see the contact you're looking for, it's stored in another account.
  5. You can import the contact from a third-party service into iCloud.

Set iCloud as the default account for your contacts:

  1. Tap Settings > Contacts.
  2. Tap Default Account.
  3. Select iCloud.

Calendars and Reminders

Don't Trust The Maze Mac Os 11

See which account your calendars are in:

  1. Open the Calendar app.
  2. Tap an event to open it.
  3. Tap the calendar name to see if the event is in an iCloud calendar.

Set an iCloud calendar as the default calendar:

  1. Tap Settings > Calendar.
  2. Tap Default Calendar.
  3. Tap a calendar under iCloud to make it your default.

See which account your reminders are in:

  1. Open the Reminders app.
  2. Tap the list name in the upper-left corner to view all your lists.
  3. See if the list is stored on your device or iCloud. Open a list and tap Edit. If you see Sharing, then your list is in iCloud.

When you create a reminder, you can choose to store it in iCloud or on your iOS device.

Restart the Contacts, Calendar, or Reminders app

  1. Double-click the Home button to see your open apps.
  2. Find the app, then swipe up to close it.
  3. Press the Home button to return to your Home screen.
  4. Wait a minute, then open the app again.

Turn off iCloud Contacts, Calendar, or Reminders and turn it back on

  1. Tap Settings > [your name] > iCloud.
  2. Slide to turn off Contacts, Calendars, and Reminders.*
  3. If you see your calendars or reminders on iCloud.com or any of your devices, you can choose Delete from My [device]. If not, choose Keep on My [device].
  4. Wait a few minutes, then turn on Contacts, Calendar, or Reminders again.

* Local reminders will be deleted from your device, but your information won't be deleted from iCloud. Once you turn Reminders back on, your reminders will be re-synced to your device.

Restart your iPhone, iPad, or iPod touch

Restart your device. Here's how to restart your iPhone, iPad, or iPod touch.

Force sync Calendar data on Apple Watch

To force sync Calendar data on your Apple Watch:

  1. Open the Watch app on your iPhone and tap the My Watch tab.
  2. Tap General, then tap Reset.
  3. Tap Reset Sync Data.

If a family member set up your Apple Watch for you, you can't force sync Calendar data.

macOS

After each step, check your contacts, calendars, or reminders.

Refresh your calendars and reminders

You can refresh your calendars from the Calendars app:

  1. Open the Calendar app.
  2. Choose View.
  3. Refresh Calendars.

Since the iCloud Birthdays calendar updates hourly, you might not see changes to birthdays in the Contacts or Calendars app for an hour.

To refresh your reminders, quit the Reminders app and then open it again.

Check your default Calendar, Reminders, and Contacts account

If you store and edit your events in iCloud instead of another place, like On My Mac, Exchange, or Google, then iCloud automatically updates your calendars. If you use multiple accounts on your Mac like iCloud, Gmail, and Yahoo, make sure that iCloud is your default Calendar account:

  1. Open the Calendar app.
  2. Choose Calendar > Preferences.
  3. In the General tab, make sure that one of your iCloud calendars is the default.

If you store and edit your contacts in iCloud instead of another place, like On My Mac, Exchange, or Google, then iCloud automatically updates your contacts. If you use multiple accounts on your Mac like iCloud, Gmail, and Yahoo, make sure that iCloud is your default Contacts account:

  1. Open the Contacts app.
  2. Choose Contacts > Accounts.
  3. Click the iCloud tab and make sure that you're signed in with your Apple ID.

As long as you've turned on Reminders in System Preferences, you see your iCloud reminders on your Mac.

Turn off iCloud Calendar and iCloud Reminders, then turn it back on

  1. Quit the Calendar and Reminders apps.
  2. Choose Apple menu  > System Preferences, click Apple ID, then click iCloud. If you’re using macOS Mojave or earlier, choose Apple menu  > System Preferences, then click iCloud.
  3. Deselect Calendars and Reminders.*
  4. Close System Preferences and wait about a minute.
  5. Choose Apple menu  > System Preferences, click Apple ID, then click iCloud. If you’re using macOS Mojave or earlier, choose Apple menu  > System Preferences, then click iCloud.
  6. Select Calendars and Reminders.
  7. Open Calendar and Reminders.

* Local reminders will be deleted from your device, but your information won't be deleted from iCloud. Once you turn Reminders back on, your reminders will be re-synced to your device.

Restart your computer

After you restart your computer, see if you fixed the issue.

iCloud.com

If you don't see all your updates or have another issue, try these steps on iCloud.com:

  1. Update your browser and clear the cache.
  2. If you don't see updates from other devices, open another app on iCloud.com, like Mail. Then go back to the Contacts, Calendar, or Reminders app.
  3. Sign out of iCloud.com, then sign back in.
  4. Clear your browsing history. Choose History > Clear History.

Since the iCloud Birthdays calendar updates daily, you might not see changes to birthdays in the Calendars app until the next day.

If you get a spam iCloud Calendar request

If you get a calendar request that you think might be spam or junk, let us know. Sign in to iCloud.com with your Apple ID and go to the Calendar app. Open the event that you wish to mark as Junk, click Report Junk, then click OK. We'll automatically delete the event from your Calendar on all your devices signed in with the same Apple ID.

You can also go to the invitation from your iPhone, iPad, iPod touch, or Mac and choose Report Junk > Delete and Report Junk.

Microsoft Windows

After each step, check your contacts, calendars, or reminders.

Reminders are called Tasks in iCloud for Windows.

Don't Trust The Maze Mac Os Download

Refresh Outlook

Don't Trust The Maze Mac Os Catalina

Turn off iCloud Contacts, Calendar, and Tasks, then turn it back on

  1. Open iCloud for Windows.
  2. Deselect Mail, Contacts, Calendars and Tasks, then click Apply.
  3. Wait a few seconds, select Mail, Contacts, Calendars & Tasks, then click Apply.
  4. Open Outlook.

Make sure the iCloud Outlook Add-in is active

In Outlook 2010 and later:

  1. Click the File menu.
  2. Click Options in the left panel.
  3. Click Add-Ins in the left panel of the Outlook Options window.
  4. Look at the list of add-ins in the Active Application Add-Ins section.
  5. Select the iCloud Outlook Add-in.

Learn how to manage Add-ins with Microsoft Outlook.

Check your default account in Outlook

In Outlook 2010 and later:

  1. Click the File menu.
  2. Select Info > Account Settings > Data Files.
  3. If iCloud is the default account in the Comments column, select a different account, and click Set as Default.

Restart your computer

After you restart your computer, see if you fixed the issue.

If you still need help

Don't Trust The Maze Mac Os X

If you still need help, contact Apple Support. You can also use these steps to remove duplicate contacts or calendars.

Don't Trust The Maze Mac OS

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