If you need to erase your disk before installing macOS, select Disk Choose Reinstall macOS (or Reinstall OS X) from the Utilities window.
A Mac can't be sold or given away with Lion installed, unless it came from one of Apple's USB thumbdrives, in which case there won't be. With the release of the OS X Lion operating system for Mac computers, Apple ceased traditional distribution of physical retail discs and instead offered the OS as a download via the Mac App Store.
This article will walk you through the process of reinstalling OS X Lion.
Having a bootable flash drive that contains the OS X Lion installer is also a good way to retain a working copy of the installer that you can then use at any time. Tom Nelson has written hundreds of articles, tutorials, and reviews for Other World Computing and About.
The Lion installer assumes you want to install Lion on the current startup drive.
One method requires you to create a bootable Lion install DVD, and the second lets you perform a clean install using the Lion installer you downloaded from the Mac App Store. After your Mac restarts, the installation process continues.
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|The difference between the two methods is that to use the Lion installer directly, you must have a drive or partition that you can erase before running the installer.
You can install Lion on any internal drive, including SSDs solid state drives.
You must erase the target drive before you can start the Lion installation process. However, it is better not to use the Migration Assistant at this point, opting instead for a clean installation of Lion.
When prompted for the administrator account name, enter your name. Enter the password you want to use, along with any additional information requested and then click Continue.
OS X Lion Installation Guides
One method requires you to create a bootable Lion install DVD, and the second lets you perform a clean install using the Lion installer you downloaded from the Mac App Store.
Upgrading to OS X (Lion); Reinstalling Lion.
Reinstalling while keeping files, applications, and settings; Reinstalling while erasing.
You can also choose one of many pictures already installed in Lion. A Lion upgrade install is both the easiest and the default method for upgrading from Snow Leopard to Lion.
The Lion installer assumes you want to install Lion on the current startup drive. Another advantage of using the upgrade process is the installation time is drastically reduced, meaning you will be back to work or play before you know it.
Video: Erase and install os x lion How to clean install OSX Lion from Usb or DVD
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|When prompted for the administrator account name, enter your name.
How to Perform a Clean Install of OS X Lion on Your Mac
There's no longer a click-a-button method for performing a clean install of Lion on an empty hard drive, but as it turns out, it's still pretty easy to do. Purchase Lion from the Apple Store online. Depending on the type of touch-based input device you have Magic Mouse, Magic Trackpad, or integrated trackpadyou see a description of how to scroll.
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