Adding a second screen is now as easy as adding the Kensington Universal Multi-Display Adapter. With an additional screen, you can screen emails, chat, and work on your presentation, all at once without juggling, flipping or tabbing through open windows. In fact, research has shown that those adding multiple screens increased productivity by 42%. Operating Systems Compatibility: PC and Mac compatible including Windows XP (sp2, sp3, including Tablet PC editions), Windows Vista sp1 (32-bit and 64-bit editions) or later. Mac OS X 10.4.11 and Mac OS X 10.5.5. Intel-based Apple computers including Mac Mini (Intel), iMac (Intel), MacBook, MacBook Pro, MacBook Air, and Mac Pro. Note to Mac computer users: Video responsiveness of connected external monitor is reduced but functional for everyday computing. Package Content: Universal multi-display adapter, USB cable, DVI to VGA adapter, quick start guide, CD for software drivers. Universal compatibility with all brands of computers, including netbooks, via USB: Acer, Apple, Asus, Compaq, Dell, Gateway, HP, IBM, Lenovo, Sony, Toshiba and more.