OS X Mountain Lion will be available for free to all those who purchased a Mac after June 11

  OS X Mountain Lion it would be released this week and everyone who now owns a Mac with OS X Lion installed will have the opportunity to upgrade to OS X Mountain Lion for only $20. Excluded from this rule are all those who bought a Mac after June 11 and up to the release date of OS X Mountain Lion, these users having 30 days to request OS X Mountain Lion for free . Up-To-Date Program is used by Apple to give users OS X Mountain Lion for free, and last year the exact same thing was done with OS X Lion.

The OS X Mountain Lion Up-to-Date upgrade will be available at no additional charge from the Mac App Store to all customers who purchase a qualifying new Mac system from Apple or an Apple Authorized Reseller on or after June 11, 2012.

Customers must request their Up-to-Date upgrade within 30 days of purchasing their Mac computer. Customers who purchase a qualifying Mac between 11 June 2012 and the date when Mountain Lion is available in the Mac App Store will have 30 days from the OS X Mountain Lion release date to make a request. When Mountain Lion becomes available in July, come back to this page for details on how to request your copy of Mountain Lion.

  Practically, if you purchase a Mac between June 11 and the release date of OS X Mountain Lion, you will make a request to Apple and you will receive a free promo code to download the operating system, and if you purchase a Mac after the release date of OS X Mountain Lion you will get this operating system for free anyway. Those who purchased a Mac before June 11 will have to pay $20 to update.