2 iMacs
I have purchased a 2020 iMac. I still have my 2010 iMac. They seem to be sharing files and information. Can I turn off File Sharing or change my Apple ID without losing information on my 2020 iMac?
New 27" iMac
This feature is made to easily access files, but if you want it off, go to the Mac you do not want iCloud using, then go to System Preferences > Apple ID/iCloud > iCloud Drive > turn off Desktop/Documents folder.
Cheers,
Jack