What causes Time Machine to stall during backups?

fortunately for me i didn't have to spend a lot of time getting a solution that worked for me. but it was a stressful day and a half. i needed that backup to work. now. you can't possibly know i'm old :-) my wife once gave me a garage door opener for christmas. it was for a house that should never have had an automatic opener and it took me all day to install it (it would close, but bounce back open). the upside? her father, a very accomplished handyman, came over to help. he said there's nothing for it except to hew out the beam to make room for the travel rod. i looked at it and said to myself, hey that's a right triangle. if i only knew the Pythagorean theorem, i could resolve this issue without a single hew. fortunately, i know that theorem and solved the problem in 5 minutes by lowering the control unit to make the travel rod the length it needed to be. i love telling that story. lee

Hi Lee! You can't possibly know I'm old too. But that made your Pythagorean Theorem story all the more pleasurable. I taught physics for 45 years and in that time Pythagoras and his insight into right triangles came in more handy than one would think in a world dominated by things very, very small and very, very large. I hope you gave yourself a heartfelt pat on the back for such a clever solution to the garage door caper. As for receiving a garage door opener from your wife for Christmas, it is my opinion that there is nothing that says "I love you" more than receiving such a gift. You are a very, VERY lucky man. Continued good fortune with Time Machine. Kind regards, Luigi

Please, provide Apple with documentation of your experience via Apple Feedback. Here is the link to Apple Feedback for the Mac Mini. Feedback - Mac mini - Apple

Okay thanks I'll format the external drives and wipe the NAS partition then before going through with the procedure.

You do not need to wipe out the NAS partition. It works if you just delete the appropriate sparse bundle.

Also, make sure that you don’t turn on the Firewall again.

Does anyone know if Apple fixed this problem in the upcoming Sequoia 15.1 update?

Eh..... turn off the Firewall? Why? Are there issues with it?

I would have thought it'd be a major security issue if it was turned off?

Indeed I do!

Heck I'd not heard of it causing issues (or causing this one), is it a known issue?

Understood, hoping they do fix it in 15.2!

I quite agree. I did point them at this thread. They need to take the issue on board and resolve it.

I'm now fully restored and back to running Sequoia 15.1, so let's see if the issue reoccurs ....

Me too.

I'm just using an external drive and never(!) had any issues with it before 15.2.

I've tried everything to fix it. Nothing works.

I am waiting for 15.2. I do not dare to break out from the workin 15.0.1 I have.

I've disabled spotlight on all local drives, so I doubt it would help me.

這真的很酷 現在真正知道了