Contacts
Use CardDAV to sync contacts on your Mac with your Google Contacts.
On your Mac, go to
Applications > Contacts.
In the Contacts application, go to
Contacts > Preferences > Accounts > +
In the window that pops up, enter the following:
Account type: CardDAV
Username: <Your username at your domain, for example:
john@solarmora.com>
Password: <Your password>
Server address: google.com
You contacts will now start syncing from your Google account with your Mac. Any new contacts you make on your Mac will sync with your Google account, and any new contacts in your Google account will sync with your Mac.