Contacts Sync for Google Gmail lets you quickly and easily synchronize your contacts from Gmail and Mac so you can access your contacts wherever you go. This application stands out from the competition for its reliability, ease of use, speed and a true “two-way sync” that allows you to merge changes you’ve made to your Gmail contacts and Mac. It is also important that this application syncs groups contacts with Google. For example, you can have your Gmail contacts organized into groups such as “Friends”, “Family” and “coworkers”. After syncing, your Mac groups will match your Gmail groups.