How to Troubleshoot Activity Monitor Problems on Mac?

Share This:

Activity Monitor is a crucial tool on Mac that helps users monitor and manage their system’s performance. However, there are instances when Activity Monitor may not open or behave abnormally, causing frustration and hindering users from tracking their system’s activity. In this article, we will explore some potential solutions to fix the issue.

The first and simplest trick to try when Activity Monitor fails to open or respond is to restart your Mac. Restarting the system refreshes the operating system and can often resolve temporary errors that may be causing the problem. To restart your Mac, simply click on the Apple menu in the top-left corner of your screen, and then select the Restart option.

If restarting your Mac doesn’t resolve the issue, the next step is to reset the Activity Monitor settings. To do this, you need to quit Activity Monitor first. You can do this by either pressing the Option, Command, and Esc keys simultaneously, or by clicking the Apple menu, selecting Force Quit, and then choosing Activity Monitor from the list. Once Activity Monitor is closed, you can proceed with resetting its preferences.

To reset the preferences, you need to delete the preferences file for Activity Monitor. You can find this file by navigating to the following location: ~/Library/Preferences/. Look for a file named “” and delete it. Additionally, check for any preferences lock files with a similar name and delete them as well. After deleting these files, you can relaunch Activity Monitor and see if the issue has been resolved.

In some cases, the problem may be related to a corrupted cache. Clearing the cache can often fix issues with various applications, including Activity Monitor. To clear the cache for Activity Monitor, you need to navigate to the following location: ~/Library/Caches/. Look for a folder named “” and delete it. Afterward, relaunch Activity Monitor and check if it now opens and functions properly.

If none of the above solutions work, there may be a more complex underlying issue with your system. In such cases, it is recommended to seek help from Apple Support or a professional technician who can diagnose and fix the problem.

If you are experiencing issues with Activity Monitor not opening or behaving abnormally on your Mac, there are several steps you can take to resolve the problem. Restarting your Mac, resetting Activity Monitor preferences, and clearing the cache are some of the troubleshooting methods you can try. If the issue persists, it is advisable to seek expert assistance.

Why Wont My Activity Monitor Open On My Mac?

There can be several reasons why your Activity Monitor is not opening on your Mac. Here are some possible causes and solutions:

1. System Glitch: Sometimes, a temporary glitch in the system can prevent Activity Monitor from opening. In such cases, restarting your Mac can often resolve the issue. To restart, click on the Apple menu in the top-left corner of the screen, and select “Restart.”

2. Busy System: If your Mac is overloaded with processes and applications, it may take longer for Activity Monitor to open. In such cases, it is recommended to wait for a few minutes and try opening it again.

3. Application Conflict: It is possible that another application or process on your Mac is conflicting with Activity Monitor, causing it to not open. To troubleshoot this, you can try quitting all other applications and then attempting to open Activity Monitor. If it opens successfully, you can relaunch the closed applications one by one to identify the conflicting one.

4. Permissions Issue: Incorrect permissions or corrupted system files can also prevent Activity Monitor from opening. You can try repairing disk permissions using the Disk Utility application. Open Finder, go to “Applications,” then “Utilities,” and launch “Disk Utility.” Select your startup disk, click on “First Aid,” and choose “Repair Disk Permissions.”

5. Outdated macOS Version: Sometimes, an outdated macOS version can cause compatibility issues with Activity Monitor. Check for any available software updates by clicking on the Apple menu, selecting “System Preferences,” and clicking on “Software Update.” If an update is available, install it and then try opening Activity Monitor again.

6. Third-Party Software: Certain third-party software or utilities can interfere with the normal functioning of Activity Monitor. If you have recently installed any such software, try uninstalling it and then check if Activity Monitor opens properly.

If none of these solutions work, it is recommended to contact Apple Support for further assistance.

activity monitor not opening

How Do I Reset Activity Monitor On Mac?

To reset Activity Monitor on your Mac, follow these steps:

1. Quit Activity Monitor: First, close the Activity Monitor application if it’s currently open. You can do this by clicking on the “Activity Monitor” menu in the top menu bar and selecting “Quit Activity Monitor.”

2. Locate the preferences file: Open a Finder window and navigate to the “Library” folder on your Mac. You can access this folder by clicking on the “Go” menu in the top menu bar, holding the “Option” key, and selecting “Library.” Once in the Library folder, go to the “Preferences” subfolder.

3. Delete the preferences file: In the Preferences folder, search for a file named “” and move it to the Trash. This file contains the preferences and settings for Activity Monitor.

4. Delete preferences lock files (if present): While still in the Preferences folder, check if there are any files with names similar to “” If you find any, delete them as well.

5. Reopen Activity Monitor: After deleting the preferences file and any lock files, you can reopen Activity Monitor. You can find it in the “Utilities” folder within the “Applications” folder, or you can use Spotlight to search for it.

By following these steps, you will have successfully reset Activity Monitor on your Mac. Keep in mind that resetting Activity Monitor will remove any custom settings or configurations you may have had, and it will revert the application to its default state.

What To Do When Activity Monitor Freezes?

When encountering a situation where the Activity Monitor freezes on your computer, it is important to take appropriate action to resolve the issue. Here are the steps you can follow:

1. Force Quit: The first step is to force quit the Activity Monitor application. To do this, press the Option, Command, and Esc (Escape) keys together. Alternatively, you can click on the Apple menu and select “Force Quit.” This will bring up a window displaying all active applications.

2. Select Activity Monitor: From the list of active applications, locate and select “Activity Monitor.” This will highlight the application.

3. Click Force Quit: Once the Activity Monitor is highlighted, click on the “Force Quit” button at the bottom right corner of the window. This will forcefully terminate the frozen Activity Monitor process.

4. Relaunch Activity Monitor: After successfully force quitting the frozen Activity Monitor, you can relaunch the application. To do this, go to the Applications folder, locate the Activity Monitor application, and double-click on it to open it again.

If the issue persists and the Activity Monitor continues to freeze, you may need to troubleshoot further by considering the following steps:

5. Restart your computer: Sometimes, a simple restart can resolve temporary system glitches. Go to the Apple menu and select “Restart” to reboot your computer. After the restart, try opening the Activity Monitor again to check if it works properly.

6. Update macOS: Ensure that your macOS is up to date. Go to the Apple menu, select “System Preferences,” and then choose “Software Update.” If any updates are available, click on “Update Now” to install them. Updating your operating system can fix compatibility issues and bugs that may be causing the freeze.

7. Check for third-party software conflicts: If the problem persists, it could be related to conflicts with other applications or software installed on your computer. Try quitting or uninstalling any recently installed or updated applications to see if it resolves the freezing issue with Activity Monitor.

8. Contact Apple Support: If none of the above solutions work, it is recommended to contact Apple Support or visit an Apple Authorized Service Provider for further assistance. They will be able to provide more specific guidance based on your system configuration and diagnose any potential hardware or software issues.

By following these steps, you should be able to address the freezing issue with Activity Monitor and ensure the smooth functioning of your computer.

How Do I Open Activity Monitor?

To open Activity Monitor, you can follow these steps:

1. Launch SQL Server Management Studio.
2. From the Tools menu, click on Options.
3. In the Options dialog box, you will see a list of categories on the left side. Expand the Environment category.
4. Under Environment, you will find the Startup option. Click on it.
5. In the At startup drop-down list, you will see various options. Select “Open Object Explorer and Activity Monitor.”
6. Click on OK to save the changes.

Now, whenever you start SQL Server Management Studio, both Object Explorer and Activity Monitor will open automatically.

Please note that these steps are specific to SQL Server Management Studio and may vary slightly depending on the version you are using.


If you are facing issues with Activity Monitor not opening or behaving abnormally on your Mac, there are a few troubleshooting steps you can try. The first and simplest step is to restart your Mac, as this can help refresh the system and fix temporary errors that may be causing the problem. Additionally, you can reset the Activity Monitor settings by quitting the app and deleting the preferences file and any preferences lock files. This can help resolve any configuration issues that may be preventing Activity Monitor from functioning properly.

If these steps do not resolve the issue, you may need to seek further assistance from Apple Support or consider other troubleshooting methods. It’s important to note that Activity Monitor is a useful tool for monitoring and managing processes on your Mac, so it’s worth taking the time to troubleshoot and resolve any issues you may be experiencing with it.

Share This:
Photo of author

Sanjeev Singh

Sanjeev is the tech editor at DeviceMAG. He has a keen interest in all things technology, and loves to write about the latest developments in the industry. He has a passion for quality-focused journalism and believes in using technology to make people's lives better. He has worked in the tech industry for over 15 years, and has written for some of the biggest tech blogs in the world. Sanjeev is also an avid photographer and loves spending time with his family.