Parallels Desktop 8 for Mac is lets you seamlessly run Windows and Mac applications side-by-side

TIP: Update MacBook Air firmware to install Windows 8

Apple reports that in order to run Windows 8 with Boot Camp 5 on the MacBook Air (Mid 2012), this Mac model needs the MacBook Air EFI Firmware Update 2.6 or later. If Firmware 2.6 or later is not installed, Windows 8 may not start or start with low-resolution graphics. As reported last week, there are other particular Mac models that also have issues with Windows 8 and Boot Camp.

If you've had this problem and tried to boot Windows and it just stopped, you'll have to turn off the MacBook Air by holding the Power button. Start up again while holding the Option key and then select the Mac partition when it appears to boot from OS X. You can find the firmware update by selecting Software Update in the Apple menu.