If not, power off the Mac and hold the option key after you press the power on key. When the installer finishes, you should boot to the welcome screen instead of your usual Mac. How to Download and Install Windows 8 in Virtual box in mac.
It's a new (and aggravating) level of security on the Mac.
rbz plugin files will not install or load with SU 8 and OS X Mountain Lion From Sage Berlydrue, the problem has cropped up because Mountain Lion does not allow any 'unknown' entities to install.
