Yes it does. I was wondering this myself and looked it up on the Olympus website. here's the link to see for yourself.
"Which computer operating systems support the VN-6200PC?
The VN-6200PC is supported by Windows® 2000 Professional, Windows XP Professional, Windows XP Home Edition and Windows Vista™ (32- and 64-bit versions). The VN-6200PC is supported on Macintosh® Mac® OS X operating systems from 10.2.8 'Jaguar' through 10.5 'Leopard'."
I have run a recording for 8 hours without any shutting off. The original batteries died a few sessions after that, though. A fresh set of batteries is recommended for those important meetings until you know the battery life of the unit.