Revert back to Mavericks from Yosemite Public Beta I have downloaded the Mavericks OS X Installation and found out it did not work. It gave me this message:


  This copy of the "Install OS X" application is too old to be opened on this version of OS X.


I wanted to downloaded the public beta thinking it would be nice since I heard there was no problems. I ran into lots of performance problems on the way. I would like to go back to Mavericks.
There is no such thing as beta software without problems.

Restore your system from a Time Machine backup taken before you installed the beta OS release. This is possible by booting into the Recovery Partition.