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Apple Computing Products:
macOS - Operating System
sluggish since updating to LION-really frustrating
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<blockquote data-quote="cwa107" data-source="post: 1322671" data-attributes="member: 24098"><p>No you don't. You essentially have a separate, hidden and protected install disc on your hard disk. If you hold down Command + R at startup, it will boot to that partition. </p><p></p><p>The Install_ESD.dmg file you mentioned earlier is the actual partition that is already on your HDD. </p><p></p><p>Once you boot from it, it's just like when you boot from a disc or a flash drive. You can then safely erase your system partition and proceed with the install and get a fresh install.</p></blockquote><p></p>
[QUOTE="cwa107, post: 1322671, member: 24098"] No you don't. You essentially have a separate, hidden and protected install disc on your hard disk. If you hold down Command + R at startup, it will boot to that partition. The Install_ESD.dmg file you mentioned earlier is the actual partition that is already on your HDD. Once you boot from it, it's just like when you boot from a disc or a flash drive. You can then safely erase your system partition and proceed with the install and get a fresh install. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
sluggish since updating to LION-really frustrating
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