My SSD had S.M.A.R.T. errors and had to be replaced. Other World Computer replaced it and loaded Catalina.
If I migrate from Time Machine, will it include the OS that was on my latest backup? I believe the latest backup was when I was running Mojave.
Mac mini, 10.15
If you want Mojave back you'll have to reinstall it.
Best way to do it is to create a bootable installer How to create a bootable installer for macOS - Apple Support
Now reboot holding Option and choose the installer to load Recovery Mode
Once Recovery Mode is up, open Disk Utility, choose View all devices View all devices or only volumes in Disk Utility on Mac - Apple Support
Now remove all volumes and partitions Add, delete, or erase APFS volumes in Disk Utility on Mac - Apple Support, Erase and reformat a storage device in Disk Utility on Mac - Apple Support
Close DU and choose reinstall macOS.
With Mojave now installed, recover from the backup.
Restore your Mac from a backup - Apple Support
If you leave Catalina, the Migration assistant will migrate your files and apps, but if you have any 32-bit app, it won't run because Catalina only runs 64-bit apps. You'll have to download a new version of your app or find a replacement.
If you want Mojave back you'll have to reinstall it.
Best way to do it is to create a bootable installer How to create a bootable installer for macOS - Apple Support
Now reboot holding Option and choose the installer to load Recovery Mode
Once Recovery Mode is up, open Disk Utility, choose View all devices View all devices or only volumes in Disk Utility on Mac - Apple Support
Now remove all volumes and partitions Add, delete, or erase APFS volumes in Disk Utility on Mac - Apple Support, Erase and reformat a storage device in Disk Utility on Mac - Apple Support
Close DU and choose reinstall macOS.
With Mojave now installed, recover from the backup.
Restore your Mac from a backup - Apple Support
If you leave Catalina, the Migration assistant will migrate your files and apps, but if you have any 32-bit app, it won't run because Catalina only runs 64-bit apps. You'll have to download a new version of your app or find a replacement.
OK, So that I covered in the last part. I wrote leave Catalina but I meant keep, sorry.
So, If you want to keep Catalina, Migration Assistant will copy your files and apps to Catalina.
In this case, if you have any 32-bit app, they won't work anymore because Catalina only runs 64-bit apps.
Perhaps I wasn't clear. I do not want Mojave back, I want Catalina which was installed by OWC when they replaced my SSD.
Restoring from Time Machine
