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Apple Computing Products:
macOS - Operating System
Booting up from external hard drive to upgrade
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<blockquote data-quote="chscag" data-source="post: 1336102" data-attributes="member: 46727"><p>The best way to install Lion clean is from DVD or a USB flash drive. Also note that in order to purchase and download Lion from the Mac App store you need to be running Snow Leopard 10.6.6. </p><p></p><p>If you have already downloaded Lion from the Mac App store and have it on a hard drive, it should work without harming any files that are already on the hard drive.</p></blockquote><p></p>
[QUOTE="chscag, post: 1336102, member: 46727"] The best way to install Lion clean is from DVD or a USB flash drive. Also note that in order to purchase and download Lion from the Mac App store you need to be running Snow Leopard 10.6.6. If you have already downloaded Lion from the Mac App store and have it on a hard drive, it should work without harming any files that are already on the hard drive. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Booting up from external hard drive to upgrade
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