Declink Duo not detected Mac Sequoia

Hi, Please assist me as I am unable to get the declink duo 2 in a Sonet Chasis to connect to a Mac mini M2 with Sequoia. It says No Desktop Video Device Detected on the Desktop video setup app. All the devices including the mac are brand new.

Same or similar issue here. I'm trying to use a new (to me) Decklink Quad HDMI in a Sonnet SE-IIIe (Mac Studio M1 Max). I have verified the slot is working with other (non-video) cards. System Information shows a video related card is in PCI, though no driver installed. Desktop Video shows the same "No Desktop Video Device Detected". LiveKey shows "Blackmagic LiveKey requires DeckLink hardware installed." and Media Express unsurprisingly shows "No Device Connected".

Any chance we're simply just jumping the gun with MacOS 15?

Figured it out with a little help from Manny in Support. Of course, it's a permissions thing on the driver. But Sequoia has moved things around a bit. Likely anyone that upgraded to OS 15 with a working card will never see this. Only people starting from scratch on 15.

When the installer asks you to permit the extension clicking OK isn't doing it. You're just acknowledging that you still have to do it. You need to go into System Preferences, Login Items & Extensions and look for Driver Extensions. You have to click on the little "i" in the circle - clicking on the section doesn't do anything. Then, in that, just enable the Blackmagic extension and reboot.

syspref.jpg (105.71 KiB) Viewed 5508 times

extensions.jpg (74.42 KiB) Viewed 5508 times

Figured it out with a little help from Manny in Support. Of course, it's a permissions thing on the driver. But Sequoia has moved things around a bit. Likely anyone that upgraded to OS 15 with a working card will never see this. Only people starting from scratch on 15.

When the installer asks you to permit the extension clicking OK isn't doing it. You're just acknowledging that you still have to do it. You need to go into System Preferences, Login Items & Extensions and look for Driver Extensions. You have to click on the little "i" in the circle - clicking on the section doesn't do anything. Then, in that, just enable the Blackmagic extension and reboot.

syspref.jpg

extensions.jpg

Thank you lord. This fixed it for me too.