Mac Mini M1 (MMM1) : Big Sur 11.5.2 16Go RAM 256Go SSD
Blackmagic Video Desktop (BMVD) : 12.1
Blackmagic cards : Blackmagic Ulstrastudio Recorder 3G (BMUSR3G) and Blackmagic Ulstrastudio Monitor 3G (BMUSM3G)
Dock : OWC thunderbolt 4 Dock (OWCTH4D)Hi guys ! I NEED YOUR HELP, I HAD SOMETHING NEW
I've got the same problem as you.
I tried to plug one BMUSR3G and one BMUSR3G on my new MMM1 for some reason (i use luna display in headless mode with an 12.9 ipad pro) i need more thunderbolt 3 (th3) ports. That is the reason i need an OWCTH4D.
So at first it didn't work at all. I install Blackmagic Video Desktop (BMVD) and OWC Dock Ejector (OWCDE) and the BMUSR3G didn't pop in BMVD and nether in the Mac System Repport (MSR).
I did all the stuff about autorising BMVD and OWCDE in Security and Privacy (S&P) and also the thing about allowing Kext by rebooting and choose reduced security.
The BMUSM3G pop in the MSR but not in the BMVD
I tried several times and finally i got an idea, i try to downscale BMVD, i download an old version (10.6 if i remeber well) and install it just to see what it will do. Obvisously it didn't work but it show me a message i didn't see before about Kext and that it has to be reconstructed for BMVD ans OWCDE. I cliked OK and reboot. Nothing work. I try another thing, i used a command line in the terminal of Recovery mode "csrutil disable" to deactivated SIP. I reboot and reinstall BMVD once or twice. At an moment, don't know exatcly how and when it FREAKING WORKED !
The BMUSM3G pop in the MSR and the BMVD ! I launch Resolve and the thing worked like a charm, i didn't believe my eyes ! I unplug the HDMI screen and plug it the BMUSM3G and i was able to monitor my Resolve output, i plugged my ipad on the OWCTH4D and used it as a screen (thanks to luna display). I was so excited, i took photos (attached) and screenshots. I try to plug a BMUSR3G in the OWCTH4D, it appears in the MSR but not in the BMVD. I decided to reboot, to see if it stays like that and .... it's gone ! Does'nt work anymore. I uninstall and install BMVD and it worked again ! I took all the screenshots i could, reboot once again and ... it's was gone for good. I tried to redo it, to redo everything i did but during 3 hours i didn't manage to make BMUSM3G on OWCTH4D appear on BMVD again
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LONG STORY SHORT : i make it work by accident and doesn't manage to make it work again, i need your help.From this experience it seems to me that it's more an keXt or apple permissions issues more that an BM or OWN restriction. What do you think ?
We have to find a work around ! IT WORKED FOR 10 MINUTES, IT'S POSSIBLE !