Apple OS X Mountain Lion Update v 10.8.5 is a recommended update which improves stability, compatibility, and security of your Apple Mac computer. The update can be freely downloaded from Apple Mac Appstore, but if you need direct download links with resume capabilities use the links shared at the end of this post.

Upgrading to Apple OS X Mountain Lion does introduces it's own set of annoyances, and one of them is auto system updates which does not allow system to power down until finished. With a slow internet speed and GB's of update to download this can be a real annoyance, as shown in the screenshot below the update would take more then a day to finish.

Luckily, there is a way out as demonstrated below.

Apple OS X Mountain Lion is now available for upgrade, there could be three major possible scenarios for an upgrade and here are they :

1. Your Mac was bought on or after June 11, 2012 - You will get the "Mountain Lion" upgrade for free, simply claim your free download coupon and download from Mac App Store.
2. You have OS X Snow Leopard/Lion installed and you bought your computer in late 2009 or after - upgrade for $20 through the Mac App Store.
3. Older computer - Check system requirements and upgrade to Snow Leopard or Lion and then procces to "Mountain Lion" upgrade.

Here are screenshots of OS X Lion to OS X Mountain Lion upgrade process.

Apple OS X 10.8 Mountain Lion is out now and with it comes the new "Gatekeeper" security feature, as evident from the name what this new security feature does is to prevent installation of unauthorized applications on user computer safeguarding them against malicious software.

The OS X Gatekeeper looks for verified “signature” by Apple in every application and block others, although essential this new security feature has broken installation of many independent software installation on Apple OS X Mountain lion and here is how to bypass this restriction both temporarily and permanently.

With 200+ new features and lots of usual bug-fixes and security patches, the all new desktop operating-system from Apple will be revealed July,2012. Christened "OS X Mountain Lion" the new upgrade brings a lot of great things from iPhone, iPad, and iPod touch to the Mac. For example, users can now send iMessages, use Game Center, receive notifications and work with integrated iCloud for a streamlined experiences across various Apple devices. A video introducing all major new features is posted after the jump.