After installing the system. "LEGO SYSTEM A/S" message.

[SuperWall]

Three years ago I bought a MacBook A1398 pro and logged in
on apple id and everything was fine. When I wanted to install
"SONOMA" system, I cleaned the disk and made a pendrive with the installer
after installation, "LEGO SYSTEM A/S" appeared in the configuration.
I tried to go back to the old "CATALINA" system and I still have this message.
I don't know what's going on, please help. Regards.

 

[Cory Cooper]

Hello and welcome.

That looks like a custom login screen and that Mac may have previously been owned and managed by LEGO A/S by some form of MDM (Mobile Device Management) system. If that is the case, it will need to be removed from their system, as it will "call home" any time it is erased to reinstall their security and management software.

Where did you originally purchase the Mac from?

C

 

[SuperWall]

Hello.
I don't know the history of the MacBook, previously the "CATALINA" system started and I could work. I didn't know about the account associated with LEGO. What can I do to run "SONOMA" because I didn't backup "CATALINA" before? Please help.