it is mind-blowing that after all these years iMac users are still experiencing this crackling sound issue for a ridiculous expensive laptop! I bought my MacBook Pro in 2020 and had on and off issues with the crackling sound ever since. It was gone for quite a while, now I did an update (sanoma 14.4.1) yesterday and it's back again! Never will buy an iMac again because of this. Did anyone find a way to fix this problem??