Time Machine Stuck on 'Preparing Backup' and Then Stops

0976235

Cancelled
Original poster
Feb 3, 2017
71
46
Hello,

Ever since I have upgraded to High Sierra, I have never been able to successfully backup my MBP via Time Machine.

It gets stuck on 'preparing backup' for around 30-40 minutes and stops automatically. Not sure what happened.
 

Frankfurt

macrumors 6502
Dec 4, 2016
341
315
USA
This happened to me when moving to a new MacBook Pro. The only way to get TC/TM working again was to delete the OLD back-ups on the TC, i.e. erase them and then started completely fresh. Hence, suggest you try this, but ONLY AFTER you made another back up of your files.
 

0976235

Cancelled
Original poster
Feb 3, 2017
71
46
This happened to me when moving to a new MacBook Pro. The only way to get TC/TM working again was to delete the OLD back-ups on the TC, i.e. erase them and then started completely fresh. Hence, suggest you try this, but ONLY AFTER you made another back up of your files.
I had to switch to a new external HDD for time machine backups. :(
 

Dave00

macrumors 6502a
Dec 2, 2003
857
70
Pittsburgh
I have a similar issue with 2012 rMBP after upgrading to High Sierra. It does eventually back up, but takes forever to get past "Preparing". I tried excluding the Time Capsule from Spotlight. It seems a little faster, but still nothing like before.
 
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