Its name refers to El Capitan, the iconic mountain located in the Yosemite National Park in California and has to do with the range of names chosen by the Cupertino-based company after exhausting all the options of large felines. It's version 10.11, the twelfth edition of OS X. MacOS El Capitan, the replacement of Yosemite, was announced during the WWDC of June of 2015. In other words, the operating system based on Unix and developed by Apple that's installed on its range of Macintosh laptop and desktop computers. So you won't find it in Applications though the Installer icon will show up in Launchpad.MacOS is the current name of the former OS X, previously known as Mac OS X. I don't know if that's necessary, but I do know that if you quit the installer the installer does a Spotlight search looking for a previous Mountain Lion OS X Installer and then updates the previous installer.

If you do this from an admin account Lifehacker suggests creating a fresh admin account for the download.

I think if you use a non-admin account and quit the installer OS X deletes the download. You need to do this from an admin account.The best description of how to do this that I've found is here: The answer above only works if you're an Administrator user, you haven't downloaded ML before, and you don't have an old copy of your install file in reach of Spotlight.Īlso the download from App Store launches installer, so you have to quit to save it. There are a few complications to be aware of, and I think Apple is tweaking the download behavior.

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