Originally Posted by No Xtra
Thank you.

Did you test that on a Mac? Running which OS?

I will do the generate/save. Shall I do it with the SAFE MODE preferences in place? Or back to my preferences?
I have a number of machines for testing, both Intel and ARM and with a variety of macOS versions up to the macOS Tahoe beta. I was not able to duplicate this problem on any of them. Safe mode shouldn't make a difference when saving a file.

Originally Posted by No Xtra
I can tap the FREEZE button on all of the tracks, but playing back after doing it, both LOOP tracks's freeze buttons 'turn off'.
That's normal - as Loops do not generate different information on each generation, they do not freeze. I didn't think of that when asking for a frozen file earlier, it's something I do by default now.

Originally Posted by No Xtra
But I'm almost certain it is caused by loops not looping properly.
I agree.

Originally Posted by No Xtra
I have purchased 2025 Mac, and I'm preparing for a total re-install (again) next week, and it would be a huge relief if the issue is solved. I am perfectly happy to re-install, and also to accept whatever reason is the cause.
I think that might be worth trying. Is BIAB installed onto internal storage or external? If external, what type of drive - solid state/SSD or hard drive/HDD? If possible do you know the drive format - APFS, EXFAT, HFS+/Mac OS Extended? Is the format "case sensitive"?

Originally Posted by No Xtra
Support have not acknowledged I've sent what they've asked for. Neither Andrew or Simon replied to my simple followup questions that would help to rule out certain specifics. I'm trying not to be too disappointed.
Apologies, it was a long weekend here and we were both away from work.

Originally Posted by No Xtra
Can you send me your TEENAGE save, and your preferences, and let's see if it still happens my end, yes?
I will do that. My preferences wouldn't make a difference, but fresh preferences might - close BB then rename the Preferences folder to Preferences2, then launch BB and try again.

Originally Posted by No Xtra
Lastly, can i try an older Mac BIAB? What's the oldest I can try, are they available to download? I'm on Sonoma across 6 Mac now, the onstage Macs.
The oldest version of macOS supported by BB 2025 is El Capitan (macOS 10.11.x). Are all the Macs you tested on running Sonoma?

Originally Posted by No Xtra
What can you tell me about permissions? I know what they are and how to change them, should all of the LOOP folders and files have the exact same permissions? I have inspected and they don't. But there's no correlation of permissions between folders containing those that play or don't play either.
Permissions should be set to allow read and write to all users. Can you set the main Band-in-a-Box folder to allow that, then click on the "..." button below that and choose Apply To Enclosed Items? Might take a little while to do that as there are up to 400,000 files in the BIAB folder.

Even better, if everything is on an external drive, you can set the drive to "Ignore Ownership" - if you Get Info on the drive that option will be below the permissions section.

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