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I have just upgraded my 2018 Mac Mini to MacOS 15 Sequoia.
Since 2019 it has always backed up to a folder called TMFolder on a Synology DS413j.
( My partner's Mini also backs up to the same NAS, but hers is still on Sonoma. Her backups still run successfully. )
Every time Time Machine on my Mini tries to backup to the NAS now, it reports:
The backup will fail anywhere between one and five minutes after starting.
Mac mini, macOS 15.0
In my case I had updated to 15.0.1 and then experienced the problem. Turning the macOS firewall OFF was the only way I've found to complete a backup to my Synology NAS. Previously I was able to back up with the firewall on while on Sequoia 15.0.
Indeed, 15.0.1 seems to contain the fix. Since updating to 15.0.1, I have been able to turn the MacOS firewall back on, and Time Machine is still behaving itself.
I tried a subsequent backup with the firewall still on, after the successful backup with the firewall off, and it worked fine. Maybe turning the firewall off is a one time thing? We'll see.
Thank you. It would have taken me ages to find that on my own!
There is a Help Forum for Synology that might interest you.
There are other pages on the site. I just picked that one as a example.
This worked. Thanks.
I found the same error in the logs. I've disabled the widget and the error hasn't reappeared, but I need to observe it for a while longer.
Which widget are you talking about?
Same issue.
MacBook Pro m3 Pro, macOS Sequoia 15.0.1 + ASUSTOR ADM 4.3.2.R9Q2.
WTF network connection should work with all kinds of versions of smb. Even the share on my macmini (sequoia) is unstable/not working with my MBPM1.
Sequoia Time Machine Synology NAS keeps disconnecting
