APFS Time Machine backups with older backups

Mr. Dee

macrumors 68020
Original poster
Dec 4, 2003
2,398
3,365
Jamaica
So, I just updated from 10.12 to 10.13; I made a backup before upgrading just in case something goes wrong. What I am worried about is making a new Time Machine backup under 10.13 with my old backups based on 10.12. Will doing this overwrite the old backups; and if so, how I can I avoid it.
 

Weaselboy

Moderator
Staff member
Jan 23, 2005
30,324
10,074
California
Will doing this overwrite the old backups; and if so, how I can I avoid it.
It won't overwrite right away, but as the backup disk becomes full, TM will start purging the oldest data and that would likely include your old 10.12 data.
 
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