Unrecoverable error after timemachine backuo

Can some help me? After uninstalling beta big sur and reinstal catalina from time machine backup Iget the following error : security agent was unable to create requested mechanism builtin:prelogin. I.ve tried several backups the problem stays. It also stays after safe boot and NVRAM reset. It is an imac 27 inch 2017 2 tb fusiondrive.

iMac 27″ 5K, macOS 11.0

Posted on Aug 25, 2020 9:20 AM

Similar questions

Issue while installing Security update 2021-002 Hello When trying to install the last security update 2021-002 on my macbook pro mid-2012 (Catalina 10.15.7), I have an error once the computer restarted and after few minutes of installation. Here is the message. Sorry it is in french but it says that an error occured while generating the kernel cache. I tried to restart but the same error occurs again and again. The only way is to exit the installation program when the error occur and then I can log in but the security update is not installed. I tried several times but same result. Can someone help ? Thanks
510 4
Gatekeeper Error Wondering why my third party software is being blocked by the OS. See attachment for error screenshot. It only started doing this on Catalina (first version that shipped with my current machine) and the software no longer works even though I know it is a legitimate software that I intentionally installed. It has been an issue on all updates to Catalina since the first one including the update to the most recent version I installed this week. MacBook Pro (16-inch, 2019) with 2.4 GHz 8-Core Intel Core i9, macOS 10.15.4, 32 GB 2667 MHz DDR4, AMD Radeon Pro 5500M 8 GB
3461 11
"Unknown error" occurring when trying to log in to apps on MacBook Pro after installing Catalina Before upgrading to Catalina yesterday, I was aware that my MacBook Pro had a virus associated with the name Tituricsec. I followed all steps to get rid of it that I found about it online, but it just kept popping back up. Now that I've installed Catalina, I see no longer see any outward signs of Tituricsec (like the constant pop-ups I used to get asking me to Accept or Deny), but now I get an error whenever I try to log in with my Apple ID and password to an app like Mail, or Messages, or iTunes, and even System Preferences. It doesn't say my username or password are wrong, it says an "unknown error occurred." Just to be sure, I changed my password, which works fine when I log in to iCloud using a browser, but I still get the same "unknown error" message when trying to log in with my Apple ID and password. I chatted with Apple Support, and "Chris" thought it could be virus related. He suggested I run Malwarebytes on my machine, which I did. But that forced a restart, so I got disconnected from my support chat. In any case, the system scanner found and quarantined 22 items, but STILL I cannot log in to any apps using my Apple ID and password. I'm really stuck! Thanks for any help you can provide.
692 1

2 replies

Aug 28, 2020 1:11 AM in response to edebee

Try this, it worked for me even though i hadn´t done anything with TeamViewer. https://community.teamviewer.com/t5/Previous-versions/Can-t-Boot-after-uninstalling-Teamviewer-on-Mac-OS-Catalina/td-p/73434

edebee Author

Level 1

10 points

Aug 28, 2020 1:20 AM in response to benjaminfromzweibrücken

thnx this fixe the problem

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Unrecoverable error after timemachine backuo

Welcome to Apple Support Community

A forum where Apple customers help each other with their products. Get started with your Apple Account.

Learn more Sign up