Click, then enter an administrator name and password.

Choose Apple menu () > System Preferences, then click Users & Groups.

But the best way to test is with a newly created account:

If another user account is already set up on your Mac, you can simply log out of your account (Apple menu > Log Out) and log in with the other account. Here's How to test an issue in another user account on your Mac : This will determine if there's an issue with your user account that's preventing the install from completing. If the issue doesn't come back, it was probably caused by a cache or directory issue with your startup disk, which safe mode fixed.ĭepending on how safe mode goes, you might also try installing the software in a new user.If the issue comes back, you might have incompatible login items.If an issue doesn't happen when your Mac is started in safe mode, try restarting without pressing any keys. To leave safe mode, restart your Mac without pressing any keys during startup. If your startup disk is encrypted with FileVault, you might be asked to log in twice: once to unlock the startup disk, and again to log in to the Finder. Release the Shift key when you see the login window.If you don't see the Apple logo, learn what to do. Start or restart your Mac, then immediately press and hold the Shift key.Here's how to Use safe mode to isolate issues with your Mac :

This will run a quick diagnostic/repair, and then it prevents certain items from loading that could be causing this behavior.

If the issue is happening with all apps, you might try installing an app in safe mode to test. To double-check, does this happen when installing a particular app, or is it with all apps? If it seems to be just one app, you might try deleting the installer and then re-downloading to test. I understand you've been unable to install new software recently. Thank you for posting in the Apple Support Communities.

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