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My mac is taking a long time to connect and when I log in after it’s up it shuts off black screen

My Mac is very slow and when it opens I sign in and then it just shows rainbow wheel and my cursor buy won’t let me open anything. When I press on safari it just bounces the emblem up and down

iMac 21.5″, macOS 10.15

Posted on Jul 23, 2021 1:12 PM

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Question marked as Top-ranking reply

Posted on Jul 23, 2021 1:51 PM

Try to boot into Safe Mode according to Start up your Mac in safe mode - Apple Support . If success try to reboot normally.


NOTE: Safe Mode boot can take up to nearly twice as long as a normal boot 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


If you still can't boot up boot into the Recovery volume (boot with the Command + R keys held down), select Disk Utility and run First Aid on both volumes. If you get any error messages rerun First Aid until there are none. Then reboot normally.



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2 replies
Question marked as Top-ranking reply

Jul 23, 2021 1:51 PM in response to Murphyschool

Try to boot into Safe Mode according to Start up your Mac in safe mode - Apple Support . If success try to reboot normally.


NOTE: Safe Mode boot can take up to nearly twice as long as a normal boot 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


If you still can't boot up boot into the Recovery volume (boot with the Command + R keys held down), select Disk Utility and run First Aid on both volumes. If you get any error messages rerun First Aid until there are none. Then reboot normally.



My mac is taking a long time to connect and when I log in after it’s up it shuts off black screen

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