You may still be purring your way through our in-depth preview, but Mountain Lion is now officially out of the bag, with Apple releasing a preview version of its latest OS X to the members-only Developer Program. If you're up to date on those $99/year dues, you can head on over to the Member Center to get your OS 10.8 fix, and start checking out those shiny new Messages, Reminders, Notes and Notification Center apps. Or kick up your feet and bring your desktop to the big screen with AirPlay Mirroring. If you have the Apple-approved credentials to proceed, you can find all that and more by making your way over to our source link just below.