No DXV 3 codec (Quicktime) for export on MacOS?

FYI, DXV3 should be listed in the same dropdown where you get Quicktime. I know it used to be nested in with all the other quicktime codecs but now it'll be found as it's own thing. Same thing happened with HAP.

First - greetings fellow VJ - let the light be with you.
So I have two informations for you and as usual one is good and one is bad

Bad: For now if you wish to export DXV files from AE you have to use earlier version of AE. It was comming and in latest Adobe update they dropped support for 3rd party QT codects so also for DXV so in latest version tyyou can't use

Good: Resolume team working (and they said it will be ready soon) on exporter plugin for Adobe products. So be patient.

For now as I said you can use earlier version of AE/Media Encoder version for DXV export. Or after rendering your outputs from AE to some other codecs just batch rerender them in (that what I use and what i know that work):
-  Windows - MPEG Streamclip (can't render with alpha
- MAC - QTAmateur

And lastly - before you start bashing Adobe for that decision let me clarify:
a) It was long time comming and that is just another step of getting rid of QT
b) dropping QT support is good thing because QT is old outdated and 32bit piece of s... oftware

The only regret that I have is only that Resolume guys (that I love and I use that software since version 1.5) did not made Adobe exporter avaliable before Adobe dropped latest version of updates - they know (or should know) that it is comming.

Have you tried uninstalling and then re-installing the CODEC. And, yes, this is very likely to Adobe dropping support for legacy, 32-bit QT CODECs - just take note that it was Apple that dropped support for said CODECs.

Please drop a note to let others know if the uninstalling and reinstalling helps.