![]() With the OS X USB Installer disk ready follow Carstens's advice and hold down option after reboot and boot up from the installer and unfettered from the installed OS X on your internal disk install the OS X version on the external disk of your choice. Wait for the installation to complete, This can take a very long time, like an hour or so, depending on the speed of the disks involved and other factors. In both cases you of course need to supply your administrator password as usual. Alternatively, if Yosemite issue this updated command instead: sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia -volume /Volumes/ -applicationpath /Applications/Install\ OS\ X\ Yosemite.app -nointeraction If there are spaces in the name use "quotation" marks around the whole path: "/Volumes/". Replacing with the name of the disk you want to reformat into an installation disk. Open up Terminal and if Mavericks, then issue this command on a single line: sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia -volume /Volumes/ -applicationpath /Applications/Install\ OS\ X\ Mavericks.app -nointeraction As soon as you launch the application, it tries to find the macOS Install program with Spotlight. Start the Mavericks/Yosemite installer that you previously downloaded and stop at the first screen with the big X symbol and continue button. DiskMaker X is an application built with AppleScript that you can use with many versions of OS X to build a bootable drive from macOS installer program (the one you download from the Mac App Store).After copying, reboot holding the option key, select the install medium you just created and happily install Lion to a destination of your choice.Īn 8GB medium will be fine for the installer (it's 4.7GB), and a 32GB partition for the installed system (this will leave you with more than 7GB of free space).Ĭarsten Shultz' answer is still generally correct, but there's also the easier option to use a tool like Diskmaker X or since Mavericks use the built-in ability to make a bootable disk with a Terminal command.įor the latter with the Mavericks or Yosemite installer.In Disk Utility use "Restore" to copy the Installer to the boot medium: As destination use the newly created partition, for the source use the Finder to show the package contents (right click) of "Install Mac OS X Lion", there locate InstallESD.dmg and drag it to the source field.Take for example USB drive or SD card, partition it in Disk Utility, make one partition and make sure to select GUID partition scheme so that the medium will be bootable.Quick instructions (more detailed ones can easily be found on the net, but I have not read any thoroughly enough to be able to endorse them): More information here.The (or at least a) solution is embarrassingly simple: Do not start the installer from a running system, but make a bootable install medium from the disk image included in the install program package and use that. NB: this version of DiskMaker X is not able to build a Mavericks installer from Mac OS X 10.6.8. Thatâs OK â you can download it by launching the Mac App Store, locating and clicking on the link for macOS Sierra in the right sidebar, then clicking the âDownloadâ button. Download DiskMaker 2.0.2 ( ZIP file, about 3 MB). Chances are good that when macOS Sierra was installed on your Mac, the installer file disappeared. When it was still Lion DiskMaker, DiskMaker X had the ability to burn DVDs too. ![]() Purchase Mac OS X Lion installer on the Apple Store ![]() Purchase OS X Mountain Lion installer on the Apple Store This version of DiskMaker X is not able to build a Mavericks installer from Mac OS X 10.6.8.
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