Time Machine not backing up after OS update

Question

Time Machine not backing up after OS update

Time Machine last backed up my computer four days ago. I took a long weekend and didn't get on the computer except to run some updates yesterday and am now at the latest version of High Sierra (10.13.4).

I have been unable to complete a Time Machine backup since then. Periodically, I get the "preparing backup" message popping up on its own and I also get it if I try to manually launch a backup, but after that runs for a couple of hours, TM doesn't actually back up and still says my last backup was four days ago.

I ran first aid on my backup drive and it's fine. I've tried turning TM on and off and even rebooted. Any thoughts on how I can get TM to start working again?

Thanks,

Rae

macOS High Sierra (10.13.3)

Posted on May 21, 2018 12:33 PM

Reply

Answer 1

May 21, 2018 12:40 PM in response to Traveling Rae

ref: https://soundsupport.biz/2016/10/23/deleting-incomplete-time-machine-backups/

Reply

Answer 2

May 21, 2018 3:15 PM in response to Traveling Rae

Well, after dozens of attempts at both manually forcing a backup and letting TM do its thing, TM finally seems to be backing up at last, but very slowly.

ETA: I spoke too quickly. 😟 I'm going to try again with a different external disk.

Reply

Answer 3

May 21, 2018 3:14 PM in response to leroydouglas

Thanks -- that sounded SO promising, but I did not have that file. The issue seems to have corrected itself. 😕 However, thanks to your suggestion I saw that I have a "lost and found" folder on that drive, which is apparently Bad News. I've had a lot of trouble with that backup drive, so even though Disk Utility first aid says it's okay, I suspect it's not. I'll replace it.

So great solution for most people, I think, and you inadvertently solved a more major future issue. Thanks again!

Reply

Time Machine not backing up after OS update

Similar questions