![]() ![]() ![]() This is not a clean install (use the above boot drive methods for that), this is an upgrade to 10.7, be sure to have backups of all your Macs to be safe. Note that the OS X Lion system requirements still apply, and the target Macs will need to be running Mac OS X 10.6.6 or higher. Installing or Upgrading Mac OS X Lion on Multiple Macs This allows for easy upgrades of all your Macs and prevents you from having to re-download the app or create any installation drives. Several of these we have already covered before and you are welcome to check those out, but for the purpose of this article we are going to discuss transferring the OS X Lion installer to the other Macs. Downloading Lion again from the App Store on each Mac (it is free to re-download after you have bought it once).Transferring the Lion installer over a network.Copying the Lion installer with an external drive or DVD.Copying the OS X Lion installer to other Macs – this is the primary focus of this article by using the following methods.There are several approaches to installing OS X Lion on all of your own Macs, these include: ![]()
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