OS X 10.8.1 Update - OS X Update can't be installed on this disk.
I'm trying to update OS X 10.8 to 10.8.1 and it says -
"OS X Update can't be installed on this disk. This volume does not meet the requirements for this update."
I have no clue how to fix. I googled but could not get an answer to it. Can anybody help me please?
Thanks a lot in advance.
MacBook Air, OS X Mountain Lion (10.8)