User profile for user: oranges4apples
oranges4apples Author
User level: Level 1
37 points

Time Machine is not backing up on Tahoe 26.2

Updated my M2 Max MBP to Tahoe 26.2, now I can't get Time Machine to work. I've tried the usual steps to no avail. Anyone else have this problem and/or a fix?

MacBook Pro 16″, macOS 26.2

Posted on Dec 13, 2025 9:00 PM

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4 replies
User profile for user: oranges4apples
oranges4apples Author
User level: Level 1
37 points

Dec 14, 2025 11:36 AM in response to oranges4apples

The drive works now, I guess it "resolved" itself overnight.


This was my MBP being backed up to a 2TB SSD via Thunderbolt Cable. I went through restarting the computer, unplugging/replugging in the SSD, repartitioning the SSD through disk utility, and deleted contents off the drive (even though there was more than enough space for future backups).


I did see there were some reports in the 26.2 beta of it not working.

https://www.reddit.com/r/MacOSBeta/comments/1osaj5s/time_machine_via_nas_not_working_on_262_b1/


We can mark this as resolved. Thanks.

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User profile for user: Owl-53
Owl-53
User level: Level 10
102,433 points

Dec 14, 2025 7:23 AM in response to oranges4apples

Just to add


Not using TM Backup ( at this time ) to an attached External Drive


Yes, backing up to an attached External Drive using a Third Party application called Carbon Copy Cloner


This machine was update to Tahoe 26.2 Saturday very early hours of morning


Ran the CCC backup by about 11:00 AM Saturday and had zero issues whatsoever


https://support.bombich.com/hc/en-us/articles/20686487352599-How-to-set-up-your-first-backup


https://support.bombich.com/hc/en-us/articles/20686449773847-How-to-schedule-a-backup



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Time Machine is not backing up on Tahoe 26.2

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