iTunes U and Internet Radio have moved locations. The iOS App Store is wiped out, as are ringtones. “iTunes 12.7 appeared Tuesday following Apple’s slate of product announcements, and its version number hides how much that’s disappeared and changed in this release. This MacWorld article describes what a can of worms that is. I’m more worried about upgrading to High Sierra forcing me to upgrade to iTunes 10.7. Apparently, it will improve the speed of my OWC SSD, but that’s already so fast, there’s no need for improvement.
I assume that the problem actually lies with Apple instead and some failure to properly handle features Adobe uses more than most-cursors that change depending on what’s being hovered over. Since the problem seemed confined, in reports I’d heard, to Adobe products, I’d blamed it.