I just got this MacBook Air yesterday and I’m already discovering things about it. For instance, when I synced Gmail with Mail.app, it didn’t sync my contacts along with it. I’m pretty sure that it did on the iPod touch. For the most part, the solutions I found online weren’t exactly quick and easy nor were they very up to date. With 10.7 Lion and the new Address Book app, it’s probably a bit newer.
To get those Gmail or Google contacts imported into the system-wide Address Book, most people pointed to a little export button in Gmail itself, located under
Contacts > More Actions > Export. This method works well enough for importing specific groups but if you add people to those groups via your Android phone or via the web interface, it doesn’t sync.
I found that a better solution is to allow the Address Book sync with your Google contacts directly. To setup sync, go to
Address Book > Preferences > Accounts > Synchronize with Google. That will let you configure your account and that should export your main group of contacts and sync them in the future.
While you can’t export specific groups with this method, I feel for general use, sync with mixed devices is probably the better route to go.