MacOS Catalina has so many problem

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Lodapon Author

Level 1

8 points

MacOS Catalina has so many problem

Hello, I use my MacBook pro 13" 2018 and just update to mac os Catalina fews day ago.

This new OS lead to many problem.

Most applications cannot open for a while and show "The application xxx cannot open" but sometime the same app can open as normal. For example is Music app. As I start my MacBook it can be opened as normal. Then after working in Numbers for a while, I open the Music app again and it cannot be opened and show "The application Music cannot open". The same problem is happen with many applications too.
Safari ALWAYS stop working and not respond.
The system is stop working and I can't even 'force quit' or 'shutdown' my computer (need to push the power button to force shutdown).

Anyone know how to fix such problems.

Thanks

MacBook Pro 13”, macOS 10.15

Posted on May 17, 2020 5:03 AM

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Answer 1

Top-ranking reply

dialabrain

Level 10

125,111 points

May 17, 2020 5:53 AM in response to Lodapon

You're welcome. The first thing to do is update Catalina to 10.15.4. You are still on 10.15.1. You have some out of date Preference Panes; Perian and Flip4Mac. I would take care of those things first and test.

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Answer 2

Lodapon Author

Level 1

8 points

May 17, 2020 6:39 AM in response to dialabrain

I tried to update to 10.15.4 first as you suggest. But after restart and the apple logo appear in black screen, the process stop and show "Unable to verify start up disk" then I click 'try again' but it still back to "Unable to verify start up disk" . I choose my start up disk then my computer reboot and back to 10.15.1 again.

I've tried this 3 times. What should I do?

Can I use my Time Machine and back to OS Mojave?

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