My MacBook somehow stuck on Mountain Lion Developer Preview 4 (Build 12A256). I downloaded the Golden Master as well as the retail .dmg and tried to install them. The computer does stuff, restarts, but is still on 12A256. I also don't get the 10.8.1 Update in the App Store and if I download it manually and try to install it all I get is:
OS X update cannot be installed on this disk. This volume does not meet the requirements for this update
Do you have any idea how I get out of this mess without a clean install (because that's kind of tricky because I have 2 hard drives)?