I tried installing with updater and by DLing the dmg. But it failed to install.

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Digging in the console message, I get:
11.01.06 13:31:36 \tinstalld[236]\tPackageKit: Install Failed: (null)
Error Domain=PKInstallErrorDomain Code=114 UserInfo=0x1020c6da0 "An error occurred while setting up files for deferred installation." Underlying Error=(Error Domain=NSCocoaErrorDomain Code=513 UserInfo=0x10537e950 "You dont have permission to save the file rc.deferred_install in the folder etc." Underlying Error=(Error Domain=NSPOSIXErrorDomain Code=1 "The operation couldnt be completed. Operation not permitted")) {
NSLocalizedDescription = "An error occurred while setting up files for deferred installation.";
NSUnderlyingError = "Error Domain=NSCocoaErrorDomain Code=513 UserInfo=0x10537e950 \\"You don\\U2019t have permission to save the file \\U201crc.deferred_install\\U201d in the folder \\U201cetc\\U201d.\\" Underlying Error=(Error Domain=NSPOSIXErrorDomain Code=1 \\"The operation couldn\\U2019t be completed. Operation not permitted\\")";
}
Repaired permissions. Still no success. Anyone els