Comment by xanderlewis

If you’re using an external DAC (not just plugging in directly) I think that’ll be why you haven’t experienced it.

I used to produce a lot of music on my MacBook about 7 years ago and remember having the same thing (probably when I used to be just working on headphones straight in). I used to think one of the drivers was blown, only to (eventually, after some frustration) find that the audio was panned hard left (or right?) systemwide from the settings, and could be fixed with a single click. Never knew it was such a widely-known bug…