I was just in the flagship store in Helsinki. I asked the same questions about iSync Plugins. I was told that Mac OS X is not a priority for Nokia. When I asked what would be a compelling reason for me or any Mac user to purchase the N900, the music was the only thing missing with the tap dancing. In all honesty, I cannot see a reason why any Mac user should pluck down their money on unsupported Nokia products. If the N900 had an iSync plugin, I would own one, but as it stands, chances are I will stay with the iPhone.