MacTrast's prediction of Mac OS X Lion's release Wednesday turned out to be inaccurate. The next and more probable date of Lion's release is July 14. On the first day of July 2011, Apple released a "Gold Master" build of Mac OS X 10.7 Lion to developers, suggesting that the official release of the new operating system will be in the near future. "Gold Master" is the reference model before the final version software hits the store. Usually if all is well and there are no major show stopper bugs the Gold Master build is the Public Release. Historically, Apple moved from a Gold Master to a public release within two weeks.
The download will be $29.99 to upgrade from Mac OS X 10.6 to 10.7, at around 4GB in size. According to Apple, buyers are welcome to download the upgrade in any of its retail stores.
Before the upgrade, make sure you have already installed all of the Apple-specific updates released over the past month. Version 10.6.8 of the operating system contains tweaks that enable the digital download and upgrade process, a must-have in order for the upgrade to function correctly.