Are downloading large files from the App Store, Safari browser or terminal affecting overall system performance until they complete?
I'm noticing anytime I download large files from the App Store, through the Safari browser or via Terminal the whole system becomes uncomfortably slow until the download completes. My SSD checks out good (on MacBook Pro). Even a brand new install of the latest (10.13.3) doesn't seem to help. Files and applications are being downloaded to non-cloud synced folders. I do have Time Machine active on an external drive from time to time, but that doesn't seem to affect things either way. Anything else I should check out?
MacBook Pro with Retina display, macOS High Sierra (10.13.3), null