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dreamyguy/install-osx-from-external-drive.md

Last active January 6, 2016 23:34
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OSX's fresh install from external media
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install-osx-from-external-drive.md

  • Download the latest OSX from App Store.

    • The installer will open itself after its download. Do not proceed with install - close it!
    • Once downloaded the installer will be available on Applications folder.

  • Run the following command, taking care to rename the OSX version accordingly and to specify the name of the volume (make sure the command is typed in a single line):

sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/<name-of-volume> --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app --nointeraction

  • The prompt will ask for system password...

Password:

  • Once the password is entered, the command will run:
Erasing Disk: 0%... 10%... 20%... 30%...100%...
Copying installer files to disk...
Copy complete.
Making disk bootable...
Copying boot files...
Copy complete.
Done.
  • Connect the OSX installer drive and reboot the Mac
  • Hold down the Option key during boot to bring up the startup disk menu
  • Select the Install OS X El Capitan (for the sake of this example) media to boot from the installer volume, if it’s a USB drive it will have an orange icon.
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