Mountain Lion - Developer Preview 4 Build 12A248

Apple released a new build of Mac OS X Mountain Lion (12A248) and its the second time apple is pushing the update through the App Store instead of releasing a complete new DP.

So whats new?

Facebook integration

Like with twitter in the previous build you can now share images, websites etc.. directly from the OS to Facebook.

Note: to enable Facebook integration you need to download an additional plug in.

Power Nap

When your Mac goes to sleep, it still gets things done with Power Nap. It periodically updates Mail, Contacts, Calendar, Reminders, Notes, Photo Stream, Find My Mac, and Documents in the Cloud. When your Mac is connected to a power source, it downloads software updates and makes backups with Time Machine. While all that updating is going on, the system sounds are silent and no lights or fans come on, so nothing disturbs you. And when your Mac wakes up, it’s good to go.

Note: this only works on Macs with flash storage; the Retina Macbook Pro and the Macbook Air.

A new wallpaper

Apple also released a new build of Xcode, 4.4 DP6.

Read more about Mountain Lion.