![]() So to keep all your files you’ll need to either (1) upgrade to Snow Leopard first or (2) do a time machine backup before you erase everything, then ‘restore’ from the time machine backup when you install Lion. NOTE: IF you want to keep all your files and settings this won’t work. ![]() Now Quit out of ‘Disk Utility’ and you will be able to install Lion on your freshly erased Mac. THIS WILL DELETE ALL YOUR FILES OFF YOUR COMPUTER AND YOU WILL LOSE THEM.Ĥ. ![]() Don’t install Lion, instead go to ‘Disk Utility’ and then ‘Erase’ your main Hard Drive. To do this restart and hold down option key until you get a choice to boot from your Hard Drive or the USB Lion. To get a Lion installer you can purchase one on a USB thumbdrive from Apple Store ready to go, or you can purchase and download Lion online from Apple and then make a USB installer – see this post for how.Ģ. I had to delete the old version of OSX, then install Lion from the USB thumbdrive. Here’s how to do a fresh install of Lion.ġ. After installing Lion on my iMac, I wanted to delete everything on my laptop and do a fresh install of Lion. But the installer will not install over an older version of OSX. Download for free OS X Lion on Apple’s support page here or OS X Mountain Lion on Apple’s support page here.If you have a Lion installer on a USB thumbdrive, you can use it to upgrade your Mac from Snow Leopard to Lion, but if you have an older version of OS X you can’t upgrade. You need to first upgrade to Snow Leopard OR you can erase everything and do a completely fresh install of Lion. Mac, Mac OS, Mac OS X, Mac OS X Lion, 10.7, 10.7.5, 2012, Apple.Mac OSX Lion 10.7.2 DMG Free Download Clean Official Mac Store Release DVD. Unlike Snow Leopard, Lion brought a lot of enhancements and changes to the system's functionality. Pay for OS X Lion and Mountain Lion $19.99 through the Apple Store Mac OS X Lion is a successor to the previous Apple operating system, called Snow Leopard.The clean-install option is gone from the Lion installer Apple says its automatic installation. So if by any chance you have an old Mac and want to install an old version, you can choose one of the two paths: The automatic way preserved everything on your Mac. The new M1 Macs, for example, can only be restored to macOS 11 Big Sur. For example, only Macs launched before 2012 are eligible to install them and the user must factory reset their computer to be able to run these older OS X systems. Why would I install an older Mac OS X software?Īs for now, a limited number of Macs can install these old operating systems. Make offline OS X Lion installer flash drive Plug in your thumb drive and select it in the left-hand sidebar in Disk Utility. ![]() OS X Snow Leopard 10.6.8, Lion 10.7, or Mountain Lion 10.8 already installedĪpple notes that Macs shipped with Mac OS X Mountain Lion cannot install OS X Lion while Macs shipped with Mac OS Mavericks or later cannot install Mountain Lion. ![]() Mac OS X Mountain Lion requires the following technologies:
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