Parallels Desktop is simply the worlds bestselling, top-rated, and most trusted solution for running Windows applications on your Mac. With Parallels Desktop for Mac, you can seamlessly run both Windows and Mac OS X applications side-by-side without rebooting. Drag-and-drop files between Windows and Mac applications, launch Windows applications from your Mac dock, and do much more with speed, control and confidence.

Whats new in this version:

New interface languages, including Czech, Portuguese, Chinese Simplified, and Chinese Traditional.
Option to choose Mac OS X Snow Leopard-style full screen mode instead of native OS X Lion full screen mode.
Better compatibility with FileVault.
Improved compatibility with FaceTime HD camera and other USB devices for virtual machines with more than 2 GB of memory.
Resolves a problem with Mac slow boot time.

FOLLOW THIS GUIDE:

Use Little Snitch to block
Parallels Desktop.app = registration.parallels.com
Parallels Service.app = pdfm7.blist.parallels.com and pdfm7.vl.parallels.com
Parallels Updater.app = update.parallels.com

or

Edit the HOSTS file and add this:
127.0.0.1 pdfm7.blist.parallels.com
127.0.0.1 pdfm7.vl.parallels.com
127.0.0.1 registration.parallels.com
127.0.0.1 update.parallels.com

2. Reboot or Flush DNS cache
3. Install, use the supplied serial
4. Enjoy