SO IF YOU CANNOT JUST WAIT FOR MICROSOFT TO FIX ….
I can confirm that Mountain Duck ($39 one-time license per user multiple devices) will restore functionality on a MAC. There is a PC version but I have not installed it. Mountain Duck installs in less than 5 minutes (provided you install it in the MAC application folder). It has a profile for OneDrive and if you grant MD access VIA the OneDrive web interface (MD takes you to the correct login place) then it puts OneDrive back in Finder as you are used to seeing it. It is a really smooth auto-install. I haven’t had it long enough to speak for it’s synchronization functions between local drive and OneDrive but it has the functionality that appears to give you control over when files are stored locally and synced.
Finally, I DOUBT THAT THIS PROBLEM IS REALLY A MIGRATION ISSUE. I was in the initial group of users that posted to this thread in June-July of 2024. Notice that most, if not all, of the initial complaints were from MAC users. Does anyone think a migration process would have any sensitivity to whether a file is being shared with a MAC? Just doesn’t fit. If it’s already gone on for 9 months, do you think they’ll suddenly resolve next week?
AND MICROSOFT …. If you care…. :-) …. You could offer to reimburse us for our Mountain Duck license (discount next year’s subscription) or just buy the company and embed it in the product —- and then you can go along your merry way ignoring us as usual.