App Store not opening after latest Catalina update

I had the exact same problem. The problem seemed related to the login, so I moved the broken user out of the way, created a new user, then moved across the folders from the broken user that I cared about (/Users/brokenuser/...). I also had issues with chrome periodically hanging, but because the logging and introspection capabilities of MacOS are garbage I have not been able to find any rhyme or reason to this happening. This is now "fixed" for me, but I'm never getting my hours of time back; :sadface:

Hello Joshbyb1,

Thanks for the update. One thing you could do is to boot using safe mode and see if the issue persists.

"Start up in safe mode

To start up in safe mode:

1. Start or restart your Mac, then immediately press and hold the Shift key. The Apple logo appears on your display. If you don't see the Apple logo, learn what to do.
2. Release the Shift key when you see the login window. 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.

To leave safe mode, restart your Mac without pressing any keys during startup.

If an issue doesn't happen in safe mode

If an issue doesn't happen when your Mac is started in safe mode, try restarting without pressing any keys.

• If the issue comes back, you might have incompatible login items.
• 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."

Use safe mode to isolate issues with your Mac

Have a nice day.

Greetings Joshbyb1,

Thank you for using Apple Support Communities. It seems like the App Store app is freezing and not responding. It looks like you have already done some troubleshooting to solve this issue. Even though there is a chance that you've tried these steps already, I would recommend you follow every step and let us know if the issue persists.

If an app freezes or quits unexpectedly on Mac

Please don't hesitate to let us know if the steps resolved your issue or if you need additional assistance.

Take care.

Hey Joshbyb1,

Since the screen is white and shows no content, there may be trouble communicating or connecting to the servers.

If you can't connect to the App Store, iTunes Store or other Apple services

Please don't hesitate to let us know if the steps resolved your issue or if you need additional assistance.

Cheers.

Hey Joshbyb1,

Thank you for using the Apple Support Community. Due to the nature of your issue, you may find more information by using another one of Apple's support resources.

Get Support

Take care.