On mac desktop I was trying to record system sound (and optionally microphone sound - but for starting I was just doing system sound).
I was following this guide - https://www.appcoda.com/ios-avfoundation-framework-tutorial/
However I keep getting:
songifier.mm:8:9: fatal error: 'AVFoundation/AVAudioSession.h' file not found
gcc -framework Cocoa -framework Foundation -framework Carbon -framework AppKit -framework AVFoundation -lstdc++ -o songifier songifier.mm
There is no
AVAudioSession for the desktop - that code will have to be excluded from anything you compile for macos.