# Mac OS X: Add contact service (CardDAV) in Contacts.app

> To use contact service (CardDAV protocol), you must choose to install
> SOGo groupware during iRedMail installation.

1: Open application `System Preferences`:

![](./images/sogo/macosx.system.preferences.png)

2: Click `Internet Accounts`:

![](./images/sogo/macosx.internet.accounts.png)

3: on right panel, click `Add Other Account` at the bottom

![](./images/sogo/macosx.add.other.account.png)

4: choose `Add a CardDAV account` in popup window

![](./images/sogo/macosx.choose.account.type.carddav.png)

5: Fill up the form with your server address and email account credential

* User Name: `your full email address`
* Password: `password of your email account`
* Server Address: `https://[server name or IP address]/SOGo/dav/[your full email address]`

![](./images/sogo/macosx.add.carddav.account.png)