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2015 iMac has black border around window when opening hard drive.

2015 iMac has black border around window when opening hard drive. Monterey OS X , conventional 1TB HDD, 8GB RAM,. If you click on the red circle to close the window, another one pops up and they repeat.


Have run everything I can think of,: Disk First Aid,, SMC + NVRAM, now ready to go back to Catalina and migrate user data from TM backup. puzzalement? any ideas folks? FYI: machine is running very slow.

Posted on Jul 30, 2022 10:24 PM

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Question marked as Best reply

Posted on Jul 31, 2022 12:00 PM

Post a full screenshot of what you're seeing.


In the meantime give this a try: boot into Safe Mode according to How to use safe mode on your Mac and test to see if the problem persists. Reboot normally and test again.


NOTE: Safe Mode boot can take up to 3 - 5 minutes as it's doing the following; 

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts 

• Deletes font caches, kernel cache, and other system cache files


1 reply
Question marked as Best reply

Jul 31, 2022 12:00 PM in response to marcomman

Post a full screenshot of what you're seeing.


In the meantime give this a try: boot into Safe Mode according to How to use safe mode on your Mac and test to see if the problem persists. Reboot normally and test again.


NOTE: Safe Mode boot can take up to 3 - 5 minutes as it's doing the following; 

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts 

• Deletes font caches, kernel cache, and other system cache files


2015 iMac has black border around window when opening hard drive.

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