Improve compatibility connecting to Active Directory servers.Resolve an issue using Spotlight to search an SMB server.Improve Wi-Fi reliability for iMac (Late 2009 and newer).Resolve an issue in which icons in Launchpad could get rearranged after a restart.Want to prove you're a good cat owner? Go ahead and check for new updates right away. You'll find an even greater number of fixes / improvements after the break, and it's also worth a mention that even Snow Leopard users have received a bit of love today in the form of a security update. The update also brings improved WiFi reliability for the iMac (late 2009 and newer) and squashes a bug that'd caused Launchpad icons to become rearranged. Most importantly, the latest software introduces Gatekeeper, a security feature from Mountain Lion that makes it more difficult to inadvertently install malicious software. While the latest software for OS X Lion isn't nearly as exciting as a couple of other updates that Apple released today, Lion users will find a few worthwhile improvements within the new OS X 10.7.5 update.

How to upgrade mac 10.7.5