[BScout]

Originally Posted by budster

Avid DnX HD 36 23.976

It worked in PT 2020.11 and 2021.3

M1 no video engine. Right there in the notes on 2021.6.

There's a whole thing about native code vs translation code (rosetta 2) concerning the M chips. If Avid moved 2021.6 to more native code, then certain modular components that are still only translation code won't work with it. That's just how it is. All on one side or the other.
2021.3 and 2020.11 were 100% translation code.
2021.6 is Avid moving Pro Tools to native code. Not everything is ported at once and they put the specific note that video engine is NOT supported. So this shouldn't be a surprise and it's a pointless waste of time to try to get it to work because it simply won't. Wait for the next release. Stick with older versions.

(this is just like other things -- Logic native M1 won't run with Eucon because Eucon was only translation code so you had to run the translation code version of Logic to use Eucon. Eventually all these things will be on the same side but that is not now.)

This is not the OP's problem so I'd like to stick with their issue that should be solvable.