NB: this version of DiskMaker X is not able to build a Mavericks installer from Mac OS X 10.6.8. Download DiskMaker 2.0.2 ( ZIP file, about 3 MB). When it was still Lion DiskMaker, DiskMaker X had the ability to burn DVDs too. Click on the Erase button to format your USB drive. Click on the Erase tab and choose the Mac OS Extended (Journaled) format. This will put a file called Install OS X 10. In the sidebar of Disk Utility, select your USB flash drive. Step 1: Obtain the Yosemite Developer Preview Installer Download the OS X Yosemite Developer Preview installer from the Mac App Store. Once the download is complete, launch the Disk Utility program. Purchase Mac OS X Lion installer on the Apple Store First, you need to download the OS X Yosemite installer from the Mac App Store. Purchase OS X Mountain Lion installer on the Apple Store OSX 10.10 Yosemite sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ OS\ X\ Yosemite.This version of DiskMaker X is not able to build a Mavericks installer from Mac OS X 10.6.8. OSX 10.11 El Capitan sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app Launch the Terminal from /Applications/Utilities and enter the command below and then your password when prompted, be sure to change the ‘ MyVolume‘ name in the below command to your external disk name.
If in the instance it already says ‘Downloaded’ and it’s not in your /Applications folder, first of all try a search on your machine for it, if still no go, launch LaunchPad in Applications and find the installer, in this instance ‘Install OS X Mavericks’ and move to the Trash – now you should be able to download from the App Store app. If it’s not there check in your purchased tab of the App Store app and you can click Download. If you have previously downloaded either OSX 10.11 El Capitan, 10.10 Yosemite 10.9 Mavericks it should be in your top level Applications folder. This can be useful for downgrading an OS to an earlier version, some older machines don’t run El Capitan that well which users discover after they have upgraded. It is done via the Terminal from a command Apple introduced since OSX Lion called createinstallmedia , all you need is the original OSX app installer and a spare external drive to make a copy of the new OS installer on which you will be able to boot from. This guide deals with how to make a bootable disk of either OSX 10.11 El Capitan, 10.10 Yosemite or 10.9 Mavericks.
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