Hi, I have a Mac Mini (late 2014) i5 2.6GHz 5400rpm with 16GB ram. I do music production and after noticing a bit of slowdown and stuttering I had a look at the Activity Monitor and noticed some pretty high CPU usage %s. Logic Pro when not playing anything stays at about 20%, which I think is pretty normal. When playing audio the numbers depend on the amount of instruments but the average is about 65%. While writing this I just noticed a temporary spike of 54% for a process called "trustd", not sure what that is. I also use another program called Max MSP for audio, and I have one fairly complicated project which always goes in excess of 100% when activated. When watching a youtube video there's an initial spike which goes up to 80-100 then it tends to settle down, although if I hover the mouse over the video (activating the UI) it goes back up again to 60-70. I was on Yosemite but I just tried updating to High Sierra and haven't noticed any improvements. Could these amounts be considered normal given my specs? I'm pretty sure this wasn't a problem until about a year ago. Also, would upgrading to an SSD make any sort of difference? Many thanks!