- Making custom boot image for mac os x mountain lion how to#
- Making custom boot image for mac os x mountain lion install#
I did precisely this in my post explaining how to dual boot Mac OS X Lion and Snow Leopard. The only requirement for where a clean Lion installation is allowed is the existence of a target blank partition or hard drive that is properly formatted HFS+, this is the same requirement for past clean Mac OS X installs. In fact, many of us who are running Lion Developer Preview have performed clean installs.
Making custom boot image for mac os x mountain lion install#
Yes you can create a fresh clean install of Lion. We’ll start off with the good stuff since this is what everyone seems concerned about. I am writing this to clarify that you can perform a clean install of Lion, to show you I did so, and also to explain some of the potential confusion which has led to the misunderstanding and flame-war around the web.
This seems to have been improperly interpreted by some as that Mac OS X Lion can not be used to perform any “clean install” (for clarification: a clean installation of Lion would be a fresh install of Lion as the only operating system on a hard drive or partition, not an upgrade over a previously installed OS). The sender has a good question, and Steve Jobs answers correctly in that Lion requires Snow Leopard to install. The latest bout of frustration comes from a post on MacRumors titled “Lion Clean Install Requires Snow Leopard Disk?” that apparently quotes Steve Jobs responding to a users question regarding a clean install: Mac OS X Lion is around the corner, and mixed in with the excitement is some frustration based on a misunderstanding of the system requirements. Yes, you can still perform a clean install with the final release App Store version. Update: Lion is now available on App Store to download. Carry on for some background on the OS X Lion clean install nonissue. Only do this if you have a backup made and you are comfortable with formatting the Mac hard drive. Select the destination hard drive and install as usualĬhoosing a clean install will force the destination drive to lose all existing data.Exit out of Disk Utility, and back at the Mac OS X Utilities screen, select “Install Mac OS X”.Select the destination hard drive from the left side and click on the “Erase” tab, set the format as “Mac OS Extended (Journaled)” and click “Erase”.Choose “Disk Utility” from the Mac OS X Utilities screen.
Boot from the aforementioned Lion installer by holding “Option” at boot and selecting the external boot installer drive.Download OS X Lion from the Mac App Store and make a bootable OS X Lion installer from a USB drive.
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