Picture yet another Windows vs. Mac ad, with the dweeby PC guy and the ultracool Mac dude engaging in their usual schtick. Now picture a Jimmy Carter-esque peacemaker parachuting into the shot, getting the two to shake hands, and you’ll understand the rationale behind HP’s new class of MediaSmart home servers. HP is touting the Windows and Mac compatibility aspects of its EX485 and EX487 models, scheduled to debut in January; Apple Time Machine automatic data backup can now be set directly from the server.