(Note: As explained in our main Mountain Lion-installation article, if you leave the Mountain Lion installer in its default location in the Applications folder when you install OS X 10.8, the installer will be deleted automatically after the installation finishes. If you don’t, you’ll have to re-download the installer from the Mac App Store before you can create a bootable install drive.) So if you plan to use that installer on other Macs, or-in this case-to create a bootable drive, be sure to copy the installer to another drive, or at least move it out of the Applications folder, before you install.

Get the latest version of the Mountain Lion installerīefore you make a bootable install drive, you should make sure you have the latest version of the Mountain Lion installer. What? You didn’t even realize there are different versions of the installer? It turns out that when you download the Mountain Lion installer from the Mac App Store, that copy of the installer installs whatever version of OS X was available at the time of download. For example, if you downloaded OS X 10.8 the day Mountain Lion is released, you downloaded the 10.8. Which means that a bootable install drive you create from that installer will install OS X 10.8.0. #Mac os x mountain lion installer install However, unlike with the CD- and DVD-based Mac OS X installers of old, which can never be updated once they’re created, Apple regularly updates the Mountain Lion installer on the Mac App Store so that it installs the latest version of OS X 10.8. #Mac os x mountain lion installer mac os x #Mac os x mountain lion installer install.#Mac os x mountain lion installer mac os x.

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