It installs an app named Install Version Name. Open that app from your Applications folder to begin installing the operating system. MacOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion; OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard. Apple will send you an email for the special download code for the Mac App Store, for OS X 10.8.5 Mountain Lion within three days of purchasing the download code. IMac (Mid-2007 or later) MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later). Apple giveth, and Apple taketh away. As it released Mountain Lion through the Mac App Store Wednesday, the company simultaneously removed Lion from the store: You can’t find Lion if.

• Mac Store Apps

When Apple released OS X Lion last year as the first Mac App Store exclusive version of OS X, they put an interesting feature in place that deleted the Lion installer once it had been run. The same is true of Mountain Lion. We’ll tell you how to get that installer back – and keep it this time!

Macworld points out that with the launch of OS X Mountain Lion today, Apple has seemingly removed OS X Lion from the Mac App Store. However, users can re-download it - and then create a Recovery. In case you have OS X Snow Leopard or Lion, but want to upgrade to macOS High Sierra, follow the steps below: To download Mac OS X El Capitan from the App Store, follow the link: Download OS X El Capitan. On the El Capitan, click the Download button. Next, a file Install OS X El Capitan will download into the Applications folder.

To re-download Mountain Lion, simply hold down the Option key while launching the Mac App Store. Without letting up on the Option key, click the Purchases tab, and find OS X Mountain Lion in the list, then click the “Install” or “Download” button. The Mountain Lion installer will now download once more from the Mac App Store.

In order to keep the installer from deleting itself again (for instance, if you need to install Mountain Lion on multiple macs, or create a USB install drive), just move the installer out of the Applications folder, and store it anywhere else on your Mac.

Personally, I find that it is worthwhile to keep a copy of the installer somewhere accessible. You never know when you might need it!

Mac Store Apps

Make sure to check out our full Mountain Lion coverage for all of the latest updates, or check our Mountain Lion U category to see all of the latest Mountain Lion features, tips, tricks, and tutorials!