Aug 02, · Need to redownload Mac OS X Lion from the Mac App Store? If you plan on making an install drive but you already upgraded to Lion, you’ ll need to redownload the Installer so that you can extract the DMG file.
This is the sure fire way to do it, in short, hold the Option key for everything:. Jul 20, · Get OS X Lion from the Mac App Store Now – $ 29.
Basic requirements are a Mac that is a Core 2 Duo or better with 2GB of RAM or more, but you can review the full Lion system requirements if you want. If you haven’ t backed up already, do that too. Back in the day when we bought OS X on discs, as long as you kept that disc, you always had a bootable installer just in case.Modern, downloadable versions of OS X create a recovery partition on.