OS X: How to erase and install You can use OS X Recovery to erase your computer using Disk Utility and then reinstall OS X.
About the security content of the OS X Mountain Lion v10.8.5 Supplemental Update This document describes the security content of the OS X Moutain Lion v10.8.5 Supplemental Update.
About the security content of OS X Server v2.2.2 This document describes the security content of OS X Server v2.2.2.