blackhole installation https://github.com/ExistentialAudio/BlackHole mix output command space - midi audio midi setup click on the plus sign at bottom left add a multi-output device should contain built in output and add blackhole you can adjust the volume (I can’t seem to be able to do that) setting the input there are two options all input command space - sound change the input to default to blackhole specific input quicktime start screen recording next to the record button there is a settings button arrow (small) set the device to blackhole