Thu Jan 28, 2021 2:09 am
I just installed a DeckLink Quad HDMI Recorder in a Mac Pro, running Big Sur 11.1, and Desktop Video 12.0 (just released yesterday… nice timing).
If I connect an M1 MacBook Air to the DeckLink, using either an Apple or a Belkin USB-C to HDMI adapter, as far as the Mac is concerned, everything is fine. It shows the second display in Display settings, it will allow me to change the resolution, mirror it, etc. It even knows that it's a Blackmagic device. However Desktop Video shows not signal received, and Media Express shows no signal.
If I connect an older MacBook Pro (2015 era) with a built-in HDMI port, it works perfectly.
If I connect an iPad using the same USB-C to HDMI adapters as I tried on the M1 MacBook Air, those both work (tip to anyone reading this who needs it; the iPad will determine that the card is an HDR device and default to an HDR output; go to Settings > Display & Brightness > (connected monitor name) > HDR/SDR options).
I can connect an iPhone using a Lightning to HDMI adapter, and that works too.
So it's unique to the M1 MacBook Air. Anyone know a solution?
Also PSA — USB-C to HDMI cables do NOT work for this solution, on any device I've tested. Which is really a shame, because that cable worked connecting to a BMD Mini Recorder, but won't on this DeckLink. I was hoping for a single cable solution.
-Joseph
https://youtube.com/photojoseph
Resolve Studio 18.6.5
macOS Sonoma 14.2.1
MacBook Pro M2 Max
96GB RAM
Blackmagic Cloud Store Mini on 10gb network
Synology RS1221+ 10gb
Blackmagic UltraStudio 4K Mini
ATOMOS NEON 4K reference monitor