How to Clean Install OS X Mountain Lion. Though most users are best served by the easy upgrade process to OS X Mountain Lion through the Mac App Store, some people want to perform a clean install and start with a blank slate. Easy Screen Capture V2 0 Works On Win7 Gadgets there. A clean install means the drive is completely erased and Mac OS X 1. Welcome to Oracle VM VirtualBox VirtualBox is a crossplatform virtualization application. What does that mean For one thing, it installs on your existing Intel or. OVERVIEW. All MixWizard4 mixers can be fitted with an optional high quality audio card that will send 16 audio channels to a computer for recording or processing and. In this video tutorial Ill show you how to do a CLEAN installation of OS X Lion on your macintosh computer from a USB drive or DVD. The process described below will format the selected Mac disk and erase everything on it, followed by performing a completely clean and fresh installation of OS X Mountain Lion. Wed highly recommend backing up your Mac before performing a clean install, even if you have no intention on using it afterwards. If you dont have it yet, get Mountain Lion from the Mac App Store but do not install it yet or redownload it if you did install itCreate a bootable install drive for OS X Mountain Lion, make one manually with a USB drive or use the Lion. Disk. Maker tool to automate the process with a USB or DVDWith the boot installer drive connected to the Mac, reboot and hold down the Option key. Choose the Mac OS X Installer startup volume from the boot menu. Select Disk Utility and choose the hard drive you wish to format, click the Erase tab, and then pull down the Format menu and select Mac OS Extended Journaled as the type, name the drive if you wish. Click the Erase button and let the drive format this is the point of no return. When finished, quit out of Disk Utility and now select the Install Mac OS X option from the menu. Installing Mountain Lion From Usb' title='Installing Mountain Lion From Usb' />Choose your freshly formatted hard drive and install Mountain Lion. When the Mac reboots you will have a clean installation of Mac OS X 1. At this point you can either import files and apps from the backup you made, manually copy over backed up files, or just start anew.