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Hi All,
As you i encountered the same problems with Time machine after upgrading, , i have resolved this by giving Time machine in Privacy and security "Full Disk Access" and it works again like before.
So no need to turn of firewalls or formatting any disks
Hope this works for you all like it did for me.

Kind Regards.
Ital
 
Hi All,
As you i encountered the same problems with Time machine after upgrading, , i have resolved this by giving Time machine in Privacy and security "Full Disk Access" and it works again like before.
So no need to turn of firewalls or formatting any disks
Hope this works for you all like it did for me.

Kind Regards.
Ital
Just did that. No joy. I'll try rebooting and see.
 
Rebooted. Still no luck.
Dang that's frustrating to hear , i have external SSD's and this resolved it for me, the error i received from TM was "will try again when MAC is unlocked !!" , what ? weird error if you are working on an unlocked mac-studio
 
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Dang that's frustrating to hear , i have external SSD's and this resolved it for me, the error i received from TM was "will try again when MAC is unlocked !!" , what ? weird error if you are working on an unlocked mac-studio
I'm using an OWC Thunder Bay Mini with four 4TB SSDs, using USB-c to Thunderbolt adapter. I had been using the larger Thunderbay, connected via USB-C, but bought the Mini because I thought the large one had died, which is why the drive kept dropping. I now know that isn't true. I may try reconnecting the old Thunderbay.
 
I'm using an OWC Thunder Bay Mini with four 4TB SSDs, using USB-c to Thunderbolt adapter. I had been using the larger Thunderbay, connected via USB-C, but bought the Mini because I thought the large one had died, which is why the drive kept dropping. I now know that isn't true. I may try reconnecting the old Thunderbay.
Switched my SSDs into the old housing and have the same issue. This is particularly vexing for me, as I purchased all new drives and new enclosure thinking that would solve the problem.

The problem is MacOS 18! 18.1 and 18.1.1 haven't fixed it. Grrrr.
 
Switched my SSDs into the old housing and have the same issue. This is particularly vexing for me, as I purchased all new drives and new enclosure thinking that would solve the problem.

The problem is MacOS 18! 18.1 and 18.1.1 haven't fixed it. Grrrr.
i fully understand the vexing part, no BACK UP = NOT GOOD
yet i don't have the problem anymore , it looks like the 18 update did something to all authorizations from TM, and that should not happen imo, did apple support gave you an answer / Solution?
 
i fully understand the vexing part, no BACK UP = NOT GOOD
yet i don't have the problem anymore , it looks like the 18 update did something to all authorizations from TM, and that should not happen imo, did apple support gave you an answer / Solution?
Well, it looks like I've solved getting Time Machine to work. All this time, I've been trying to set it up without a password. This time, I decided to acquiesce and use one. Viola! Time Machine works just fine now.

Why does Apple even offer the option of no password anymore if they are going to require you have one on Time Machine? I hate having to log in to the computer and then ALSO log into Time Machine.
 
Mac Studio and two M1Air machines running current OS fail to TimeMachine (TM) backup to Synology NAS DS220j (current: DSM 7.2.2-72806 Update 2) over WiFi, FileVault off: error message is "Failed to Connect". Volume didn't connect in directory windows. Disk Utility can see the NAS drives and check/repaired them.Changed Privacy and Security>Full Disk Access to add Time Machine (which was not listed) giving permission. Now DS220j connects as directory windows list under Locations, along with IP address of same volume showing the Home folder but only shows images in all folders and new folders are listed (Home, Homes, Music) which got initial backups. It seems historical backups are lost and TM started recording from current state. (Fortunately I also backup to Carbon Copy Cloner on air-gapped external drive).
Please comment if you have found a safe way to restore original connection an TM configuration, TM files and database, without duplicate copies ("Home" v "Homes" folders) for 3 computers.
 
Just posting to keep abreast of what is happening, been having he same issue "will try again when MAC is unlocked" have tried all above suggestions and still having the same issue, if I initiate a manual backup it completes without issue, but doing a scheduled backup always fails
 
Did have the same problem AGAIN after updating to 15,2 ..

Screenshot 2024-12-16 at 12.59.57.png


Removing and adding All Disk access resolved it again ...

Screenshot 2024-12-16 at 13.06.41.png


Apple what are you doing ????
 
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