> On Jul 30, 2017, at 4:40 PM, Dinse, Gregg (NIH/NIEHS) [C] > <[email protected]> wrote: > > Until recently, whenever I looked at the Time Machine panel in > Preferences.app, it would show times for the latest backup and the next > backup that were roughly an hour apart, as expected. Now when I look, it has > often been several hour (maybe even 12 or more) since the last backup. If I > tell it to backup now, it backs up. However, an hour from then, the next > backup time often jumps by an hour but the latest backup time stays the same. > In some cases, I think it performs a backup eventually, but certainly not > every hour. I don't recall if it has gone for days without a backup, but I > think it has.
I have experienced this problem, exactly as you describe it, for a long time on my Mac Pro (Late-2013). Rebooting always fixes it for a few days. It happened both when I used a Time Capsule for backup and after I switched to using an external hard drive attached to the Mac Pro. It has not happened since I upgraded to macOS Sierra 10.13.6, but that hasn't been long enough to prove anything. My MacBook Pro (Late-2016) with Touch Bar does not experience the problem, but it is backed up through Time Machine Server onto the Mac Pro's external drive. My wife has never experienced the problem on her MacBook Air (Mid-2012), but her backups are much, much smaller than mine and it is backed up through Time Machine Server, too. Before I set up Time Machine Server and backed everything up to the Time Capsule, my MacBook Pro sometimes experienced the problem, but my wife's MacBook Air never did. Bill Cheeseman -- Bill Cheeseman - [email protected]
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