MacOS – How to do fresh install of Mountain Lion


My Mac is very slow.

My Mac is running OS X Mountain Lion after an upgrade from Lion.

How can I do a fresh install the OSX Mountain Lion, with a clean HDD (all of my documents deleted), so it feels like a new MacBook?

Best Answer

  1. Back up your data.

  2. Boot into the Recovery System by holding +R during early boot.

  3. Select Disk Utility and format your drive where OS X and your files were stored on.

  4. Quit Disk Utility and select "Install Mountain Lion".