I am trying to use custom sound for local notification on Mac Catalyst. It is working correctly for iPhone/iPad using UNMutableNotificationContent but the same is not working for Mac Catalyst. I have tried playing the custom sound using AVAudioPlayer and it plays correctly so I am assuming it is able to locate the file; the file is stored at Contents/Resources of the app directory. Also the sound file's duration is less than 30 seconds and is saved using .caf format.