I'm trying to change notification sounds for apps like messages. I've tried to copy the .caf files using terminal, but it gives me "Operation not permitted"
Does anyone know a way around this? I'm running macOS Sierra
Update: I have successfully moved BoxeeBox.caf to /System/Library/PrivateFrameworks/ToneLibrary.framework/Versions/A/Resources/AlertTones/New, and it shows up in that folder
It is not one of the options that messages gives me now though
Do I have to change the name of BoxeeBox.caf to one of the other files in AlertTones/New's names? Or is there an apple script file that I need to add BoxeeBox.caf into?
Update: it works, I needed to put BoxeeBox.caf into AlertTones/New and replaced Bloom.caf with it, but now I'm trying to change the sound that it makes when you receive a message when that chat is open. I have already replaced ReceivedMessage.caf (as seen in the first screenshot), Default.aiff, and Recieved Message(in Applications/Messages/Contents/Resources), but it is still making the origional sound. Is there a different file that I have to replace?