Mac mountain lion erase hard drive

How to Clean Install Mac OS X Mountain Lion - Hongkiat

Two, you are thinking about trading or gifting your machine to someone else, but you are concerned with the remnants of files, profiles and various credentials that if mishandled, may lead to a security leak. A clean install will give you peace of mind.


  • how to copy large files to external hard drive mac.
  • Ask Mac 911.
  • Stay Updated.

With that cleared up, in this article we will show you how to erase existing data and reinstall a brand new copy of Mountain Lion. Here is a breakdown of the steps involved:. Recommended Reading: First, grab hold of a copy of the Mountain Lion installer file.

Mac OSX Lion How to do a Clean Install

Re-enter your App Store credentials if required. Note that this may take up between 10 and 60 minutes, depending on your Internet connection speeds.


  • Can you perform a clean install of Mountain Lion?;
  • pro tools mac full download.
  • mac network settings not working.

Do not start the installation process when your download finishes. Our goal is here to keep a soft copy of the installer and in the flash drive. Double-click InstallESD. This may take a minute or two.

How Do I Reformat My Hard Drive In OS X Mountain Lion?

Plug in the flash drive into your Mac and launch the Disk Utility application. You can do it quickly by searching via Spotlight.

Your Answer

This will remove everything in the flash drive. If you replace your internal hard drive with a larger, faster, or solid state drive. If any essential OS X files become damaged or corrupted, or are deleted or renamed.

The following instructions do double duty: The instructions offered here describe both the process for installing and the process for reinstalling OS X. The OS X Utilities window appears. Click Continue.

How to erase a Mac that seems to lack erasure options

Click Continue to begin the process of installing or reinstalling OS X. The Mountain Lion software license agreement screen appears. Read it and click Agree. A sheet drops down, asking whether you agree to the terms of the license agreement.