Now even Snow Leopard users have received a bit of love today in the form of a security update. Now you will have a number of fixes and improvements in this updated version. Lion users now feel more compatible and secure within the new OS x 10.7.5 update. The MAC Operating System X Lion v10.7.5 update is the new updated release that now includes bug fixes and improves the compatibility, stability and enhanced security features for the Mac operating system.