Hi there, Sorry for the delay, I’m afraid I was unable to find a solution to your problem with your Apple M series computer, also the other person who replied to your comments doesn’t state if he’s using an M1 Mac, and I was looking for a way that didn’t involve spending money.
However, this link ( Noise Removal / add Descreen - #3 by walter.bobrowski ) was posted today give it a try it looks fantastic