How To Make USB Bootable OS X Lion 10.8 (with Video)
August 5, 2012 in Mac OS by
How To Make USB Bootable OS X Lion 10.8 (with Video on the bottom)
To move Mac OS X Mountain Lion to a bootable USB stick, you first need a a large enough USB Flash Drive with capacity. Although the installer of Mac OS X 10.8 is about 4.3 GB in size, but we recommend a USB flash drive with at least 8 GB capacity.
Tutorial How-To Create Bootable USB for OS X Lion 10.8
Watch the Video Tutorial How-To Create Bootable USB for OS X Lion
A Clean Install
Now that you have a bootable copy of Mountain Lion, this drive/disk acts as a full-fledged setup tool for upgrading other Macs to the new OS. For a clean install of Mountain Lion on any compatible Mac, follow these steps:
Insert your bootable disk or drive.
Restart your Mac while holding down the option key. This will bring up the installer.
Inside the Mountain Lion installation tool, you can open Disk Utility and erase your Mac’s hard drive. From the erase tab, choose “Mac OS Extended (Journaled)” and wipe your drive. (Make sure you have a backup first, just in case.)
Once your Mac’s hard drive is erased, quit Disk Utility and go back into the Mountain Lion installer. Choose your Mac’s hard drive and begin installing Mountain Lion.
By following those steps, your Mac will be restored to Apple’s stock setup and all of your personal files will be gone.