On my late 2012 Mini, after I've used Photoshop for just a little while (less than an hour), my Apple Magic Trackpad stops working - but ONLY in Photoshop. It continues to work in other applications. The keyboard usually continues to work, though it, too, has gone on strike once or twice. But wait . . . it gets even weirder. The Trackpad will work on the menu bar at the top (e.g., I can usually Save) but not on the tools within Photoshop (e.g., I cannot draw a Text box or Duplicate a layer). Sometimes I can bring it back by closing every other application I have open. Other times, only a restart will bring it back. Seems to me this HAS to be a memory issue. Or is this because Adobe doesn't always play nice? I welcome any ideas! I'm running Mountain Lion (never trusted Mavericks and can't upgrade to Yosemite because it doesn't support faxing and my very basic USB fax modem didn't come with any software of its own) on a 2.3 GHz Intel core i7 with 16 GB 1600 MHz DDR3 (Crucial).