Backup my system when it started sleeping?

surfbug

macrumors member
Original poster
May 20, 2017
76
3
I tried to backup the system in the external hd but every time my computer would be sleeping :-}. How do I keep my imac computer on as I back up my system?
 
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Brian33

macrumors 6502a
Apr 30, 2008
808
64
USA (Virginia)
Are you using Apple's built-in backup solution, Time Machine, to do the backups, or some other program? I believe Time Machine will delay system sleep until the backup is done.