Parallels Desktop 9 for Mac delivers all this and more:

Indispensable Conveniences

New! PowerNap extends to Windows and Windows applications so you're always up to date
New! Mountain Lion Dictionary gesture works in Windows applications
New! Connect Thunderbolt and Firewire devices to either your Mac or your virtual machine just like you do with USB devices
Enhanced! The New Virtual Machine wizard makes it even easier to create new virtual machines, automatically locating operating systems on your machine or letting you manually select a range of media types to install

Performance

40% better disk performance than the previous version
Virtual machines shut down up to 25% faster than the previous version
Virtual machines suspend up to 20% faster than the previous version
3D graphics and web browsing is 15% faster than the previous version

Cloud

iCloud, Dropbox, Google Drive and SkyDrive optimizations eliminate duplication of files locally

Peace of Mind

New! Get stuff done in Windows 8 with acelerate Start menu and the ability to run Modern (Metro) apps in a separate window rather than in full screen
New! The Security Center makes it easy for you to be sure all your stuff is secure, both on your Mac and in your Windows virtual machine
New! OS X Mavericks (10.9) and Windows Blue (8.1) support

What's New
Version 9.0.23350:

Configure Parallels Desktop to start in the background on Mac startup. Virtual machines configured to start automatically also start on Mac startup.
Administrators can set a date and time limit for a virtual machine after which it will stop working. OS X 10.9 Mavericks support
Resolves an issue with system shortcuts not working after upgrading to OS X 10.9 Mavericks.

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