Mac OS X 10.6.6

Mac OS X 10.6.6 is an update to Mac OS X 10.6 (Snow Leopard) that was released by Apple on January 6, 2011.

Mac App Store
The Dock included a new Mac App Store with the following features:
 * Discover Mac apps: Browse featured apps, top charts, and categories, or search for something specific.
 * Buy and install: Easily purchase apps with your iTunes account. Apps install in one step and are quickly available from the Dock.
 * App updates: The Mac App Store keeps track of all your purchased apps and notifies you when free updates are available.

Additional improvements

 * Security updates.
 * Addresses a cropping issue with some postscript printing in landscape page orientation.
 * Resolves an issue with some Macs (that have in ATI graphics card) in which the mouse pointer movement could become erratic if an external DVI display is connected.