Hi,
After the latest update, my Mac can’t recognize my UR824. The Security control panel is not allowing me to authorize the Yamaha extension, in case this is the problem.
I would therefore manually add the extension manually. Which is the ID for the Yamaha driver?
To recap: you can reboot into Recovery mode, and then use the Terminal to enter the following command:
kext-consent add [ID number]
It should work.
Paolo