with this iMac there're a lot of problems with audio.
i read that models without fusion drive after some time/patches the audio go normal but the model with Fusion is still bloody: after 3 minutes larsen, switch right left, noise …
i made a partition without fusion and it go better but maybe the bass tone there isn't.
see: https://discussions.apple.com/thread/54 ... 5&tstart=0
This is not an Amadeus problems but for me is very hardly with all sounds app and the mac.
Massive problem with iMac Haswell Fusion Drive (end 2013)
Moderator: Martin Hairer