This is a problem I have had for a while now. I contacted Focusrite and went through their usual procedure and they essentially just gave up. They did send an email months later apologising to be fair but they didn't offer a solution. I get big pops randomly when I'm doing nothing but I also get subtle pops, clicks, drop outs, what ever you would like to call them when I am recording guitar through the Kemper using S/PDIF.
This seemly has been solved on another post in this forum [SOLVED] Click, pops and cracks when recording/playback with interface. This was for PCs though and I am struggling to find an equivalent for Mac. Anybody have any ideas? Or have experienced this themselves?
I'm using
Logic Pro X
OSX 10.9.5
The Kemper and Scarlett Mix Control are all updated (They actually gave me an unreleased beta to use to see if that solved it)
Tested cables, different guitars etc but I am truly out of ideas.
I have also tried using the optimisation to bring my system the least problems as suggest by Native Instrument by changing all of the power options available.