The 2012 Macbook version has just got a new update
According to Cnet, this update is for the MacBook Air and MacBook Pro models manufactured in June 2012.
This update mainly fixes some bugs in Mac OS X operating system, improves the compatibility of USB devices on Macbook 2012 and improves some algorithms to improve battery life.
Currently, users can access the automatic update feature in Software Update in Mac OS X or go to support.apple.com/kb/DL1609 to download the update to the computer (update capacity is 127 MB) .