I have a new 2014 Mac Pro with a 2.7 Ghz 12 core processor, dual D500 graphics cards, 1TB internal drive and 64gig ram. I’ve an Apple 27” Thunderbolt display and a Wacom 24” Cintiq. I'm running the latest version of Photoshop and always keep all my software and drivers up to date. Before this I used a 2012 MacPro also with 64 gig of Ram and dual 6 core processors. With my new setup, I’m having various problems with Photoshop. The first problem is that I sometimes have to restart computer because trying to load my first Photoshop file of the day just results in the forever beach ball. When I restart the MacPro it loads the file fine and so do any other files from then on. BUT the main problem - which I NEVER had with my ‘older’ MacPro - is this - I’m working away drawing in Photoshop on the Cintig, move my mouse across to the Apple display and select some music to play in iTunes while I’m working. THEN, moving back to the Cintiq and Photoshop using the stylus again, there is nearly always a delay of up to 15 seconds before I get control of Photoshop again. This is weird. It’s not like I haven’t got enough ram or power!! Anyone got any ideas?