MacOS – After getting a Mac, how to install Lion again on another partition

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After getting a Mac with Lion and creating a partition to install Lion again (to have different versions of Xcode and Xcode beta on different partitions), how can Lion be installed on the new partition? (Since Lion doesn't have an installation disc).

(update: the Mac already has Lion and so in App Store, it doesn't list Lion as "purchased" but need to pay $29.99 for it)

Best Answer

I've just done what you're looking for: Install Lion on another partition. The steps follow.

  1. Locate the Lion Installer that you previously downloaded (assuming you have it at a backup drive somewhere). Not a problem if you don't have it backed up, just launch the Mac AppStore on any Mac (that is connected to the partition), find the Purchased and re-download the Lion Installer and save it to the partition (the partition has to be formatted as Mac OSX compatible i.e not FAT).
  2. When the download is completed, launch the Lion Installer.app from the partition. Follow the on-screen instructions.

Have fun with Xcode.

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