For those “MAC” folks among us, Palm has dedicated a page just to you. And a user has been kind enough to post a “step-by-step” for those who wish to sync a Treo to a Mac via bluetooth.
For information on how to overcome the difficulties of the Bluetooth sync between a Treo 650 and your Mac, visit J.B. Zimmerman’s blog post. He’s not much of a Treo fan, but he’s managed to overcome this hurdle and others have offered additional information on this particular issue on his blog.
If you want additional “Palm approved” information on using the Treo with a Mac, you may want to visit their dedicated page to learn more.