Somone over on my reddit post wrote out the steps; I haven't tried them
yet but plan to (hope to):HELP! Quest 3 cannot Mixed Reality Capture :
OculusQuest (reddit.com)
It looks like we're at the mercy of either Meta reversing the change
that broke it (maybe it was intentional but not communicated; maybe it
was accidental and they need to fix it) so that all apps supporting MRC
work again; or, devs updating their ap...
Awesome work! Thanks for chiming in here and on the reddit post with
documentation of a fix!Officially supported or not, I knew it was crazy
to toss this off as, "not supported on Q3."