I have a Virus TI connected to an iMac running Catalina via USB. Recently, I stopped being able to get MIDI events from the Virus keyboard. I have no idea what happened. Doesn't matter which DAW or app I use. The virus MIDI devices show up in Audio MIDI Setup and in the apps, but I get no events from the keyboards or knobs at all. I tried factory resetting the virus, different USB ports, nothing helps. Any ideas?
No MIDI over USB?
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The latest MacOS security update decided that incoming midi events are a security threat via usb?