How to Reinstall OS X on Your Mac, Wipe Your Drive, and Create USB Installation Media

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Howtogeek posted How to Reinstall OS X on Your Mac, Wipe Your Drive, and Create USB Installation Media

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Macs can automatically download and reinstall their operating system. This process normally keeps your personal files, but you can choose to erase them. You can also create USB installation media to speed up installing OS X on multiple Macs. This is normally a simple process just boot to OS X Recovery and select Reinstall OS X. Be sure to erase your personal files if youre selling or getting rid of your Mac, though!
 How to Reinstall OS X on Your Mac, Wipe Your Drive, and Create USB Installation Media @ Howtogeek