Snow Leopard introduces a net set of features in iCal and Address book. Apart from now having full Microsoft Exchange support, you may also synchronize your contacts and calendars with Yahoo and Google.
This new feature makes synchronizing a snap compared to with older versions of Mac OS where third-party software like Spanning Sync or Busy Sync were needed to get the job done.
Synchronizing your Address Book contacts
From the Address Book Preferences window (⌘+,), go to the Accounts tab. Here you will see options to sync with your Yahoo Mail or Gmail contacts. Simply check the type of account you wish to synchronize, enter your login information and the new GoogleContactSyncService takes care of the rest.

Synchronizing iCal events
If you’re a free lancer or a web professional, chances are you use Google Calendar to share planning information with your clients. Synchronizing GCal with iCal puts all your events in one place so you can better organize your time.
From the iCal Preferences window (⌘+,), go to the Accounts tab and click the plus (+) sign. Select the account type and enter your credentials. You may also configure the rate at which your calendar refreshes.

Your online calendars will appear just below the ones on your Mac.

You even have the ability to add new calendars by selecting New Calendar from the File menu and by choosing the account.




