You can make a difference in the Apple Support Community!
When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
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.
After additional days retrying backups, only way to get them succeed is disabling the Firewall
No. Wait until Monday when it will all be fixed.
Adrian.
Seems to be working with 15.1 update - back up has not completed but at 2GB and going strong
I had the same problem. GOOD NEWS this seems to be fixed in 15.1 (you are at 15.0.1) ... it worked today with the firewall on!!!
Correct, my Time Machine backup just completed to Synology after updating Sequoia to 15.1
M1 Macbook Pro backing up to Time Machine on Synology NAS DS 920. Upgrading to Mac OS 15.1 addressed the problem of Time Machine failing to complete, as others have noted.
[Edited by Moderator]
Unfortunately, the "Finder loses connection with the NAS volumes bug" is still present.
Confirmed that 15.1 fixed this for me, for both the Synology NAS and external USB drive Time Machine backup.
Still on Sonoma but recently had this issue - 3 different laptops all kept giving same failure to Synology NAS Time Machine backup. Eventually just had to delete that TM setup, start as new and works on all now.
Don't bother, had it since macOS 12 in combination with DSM6.x and today with macOS 15 in combination with a brand new DS923 running DSM 7.x same issue. Finder loses connection with Synology NAS (and also TM). When will Apple crushes this bug finally? In version 20? Djeezzz.
Problem with Synology is back. After working fine for one day. It doesn't matter whether MacOS firewall and Objective-See apps are disabled, Time Machine cannot connect to the NAS, although Finder has no problem.
spoona wrote:
Problem with Synology is back. After working fine for one day. It doesn't matter whether MacOS firewall and Objective-See apps are disabled, Time Machine cannot connect to the NAS, although Finder has no problem.
All of the add-on security apps — all of the add-ons — removed per vendors’ instructions, restarted, and tested again?
This then tested with current DSM on the Synology?
If so, let Synology know, if they don’t already.
Thanks - just checked and it was 'On' on my iMac Pro.
I've flagged the issue to Synology and their automated response suggested clearing all the SMB caches on the Synology Control Panel. But that hasn't fixed it, I've told them this hasn't worked and will see if they send a more detailed response later.
Just wondering - OP and myself are both running Sequoia on Intel processors and getting failures. My M2 MBA is backing up to the same Synology without issues.
Is anyone getting this fault on Apple processors?
Sorry to get peoples' hopes up. My iMac failed to back up this afternoon when I was away and gave the same error about the Synology being disconnected.
So the 'fix' doesn't do anything. Don't waste your time if you haven't started.
Synology have asked me to provide them with a log of the failure so, just as soon as the next backup fails I will share the log information with them and with Apple.
Back to my SanDisk SSD for backups!
I am afraid the problem is on Apple's side.
I have a Synology DS218+ at home, and I have this issue with my MacBook Air recently updated to Sequoia.
I have never had any problems with a Network Time Machine backup (I have three going at the moment). I also don't have Synology anything. It sounds to me that it is on Synology's side.
Sequoia Time Machine Synology NAS keeps disconnecting
