Here are the instructions on how to perform an untethered jailbreak to your iPad using the Spirit Jailbreak and Mac OS X.
You can download the Spirit Jailbreak from here and save it to your desktop.
Now double click the Spirit.app.zip file on your desktop to extract it.
Double click the Spirit application to launch it
Connect your iPad and press the Jailbreak button.
The Spirit app will then let you know the jailbreak is complete.
Now your iPad will reboot and show you progress indicator. Once this finishes your iPad will be jailbroken with Cydia installed.