Well, the dmg says "Install Pro Tools 12.5.1.pkg" so that's why I thought the number matched the OS version. Here is a screenshot of the dmg folder:
https://postimg.cc/SXSRBfdw
Please tell me if I'm incorrect but ostensibly since I have a "Perpetual License" the files in the 12.5.1 installer should be the correct files for running 12.5.1
Maybe you don't know and I appreciate your response but you didn't comment on the issue of the installation being successful but the driver installers failing.
That makes me think I just need updated drivers for the M1, for whatever version of Pro Tools was included in my installer file.
Here's a screenshot of my products download page:
https://postimg.cc/Js1R04XX
Get an old machine is not a viable option for me but I believe my perpetual license includes a working version for the M1 chip, so I think I just need the correct file and the correct drivers.