System Requirements for Mac OS X Lion 10.7. Technical Details for Mac OS X Lion 10.7.5 Resolves a video issue with some VGA projectors.

Improved Wi-Fi reliability for the iMac.Enables users to automatically logging into a NIS account.You also might follow K Shaffer 's suggestion to boot into Safe mode.

Try the combo update: < Mac OS X 10.6.8 Update Combo v1.1 >.

Multiple versions of documents saved automatically As K Shaffer suggests, maybe you do not have the little bit of extra Snow Leopard update that allows it to download and install El Capitan.

Easier to use and more powerful in term of progress and security.

Improve compatibility connecting to Active Directory servers.

Resolve an issue using Spotlight to search an SMB server.

Introduced Aqua user interface elements with button and progress bar.

You can also Download Mac OSX Lion v10.7.4DMG Free. In summary, OS X Lion 10.7.5 got all the necessary tools and features to provide more creative, secure and powerful working environment to its users. This update also brings improved Wi-Fi reliability for the iMac. Loin users now enable automatically logging into a NIS account. Another enhanced features in new Lion that most of the users love is full-screen mode.

It’s basically an iteration of Expose, the desktop-management tool that shrinks and spreads the applications all over the screen so users can switch between them easily. In the new updated version of OS X Loin 10.7.5 now advanced interface-related feature included that is Mission Control, which has nothing to do with the iPad. An amazing update in this version is improved Apple’s screen management tool.

Mac os x 10.6.8 update to el capitan