Can anyone who is using this card let me know if they have had issues with CS4. I'm trying to determine if this related to the video card. Problem: When I try to view a slide show or do a full screen view all I get is a grey screen, pictures do not display. The Radeon HD3870 Mac & PC edition meets Adobe's specs for Photoshop and Bridge CS4. Adobe has tested the 3870 with Windows but not with OS X. Adobe's documentation lists Bridges GPU functions as Preview Panel Full-screen preview Slideshow Review Mode Only the Preview Panel is working correctly. http://www.adobe.com/go/kb404898 http://www.adobe.com/go/kb405711 Here are my system specs: MacPro 2 dual-core processors 2.66 GHz 5 GB of certified memory ATI Radeon HD 3870 Mac and Windows edition the vidio card has 512 MB of VRAM I'm running OS X 10.5.5 The driver that is installed is the original from the disk. I could not find an updated driver on ATI's site or Apples site. My system info shows two listings for the HD 3870, both in slot 1. The first has display for type and yes for driver installed. The second lists ATY, MegaledonParent as type and no for driver installed.