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<blockquote data-quote="pigoo3" data-source="post: 1615017" data-attributes="member: 56379">I'm not 100% sure you can do this OS downgrade via internet recovery.&nbsp; From what I've experienced...Apple's OS install process is geared to move forward...not backward.&nbsp; Since you currently have Yosemite installed the Lion installer I think is &quot;confused&quot; when it &quot;sees&quot; a newer OS version (it expects to see an older version)...thus it doesn't proceed.Is there anything of the HD that needs to be saved/backed up?&nbsp; If yes...back it up.&nbsp; If no...then here is what I would do:- boot into the Recovery Partition (command + r)- click on Disk Utility...then erase &amp; reformat the hard drive- now try to install LionHopefully now when the Lion installer checks the drive...it will find no OS...and proceed with the Lion install.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />- Nick</blockquote>

[QUOTE="pigoo3, post: 1615017, member: 56379"] I'm not 100% sure you can do this OS downgrade via internet recovery. From what I've experienced...Apple's OS install process is geared to move forward...not backward. Since you currently have Yosemite installed the Lion installer I think is "confused" when it "sees" a newer OS version (it expects to see an older version)...thus it doesn't proceed. Is there anything of the HD that needs to be saved/backed up? If yes...back it up. If no...then here is what I would do: - boot into the Recovery Partition (command + r) - click on Disk Utility...then erase & reformat the hard drive - now try to install Lion Hopefully now when the Lion installer checks the drive...it will find no OS...and proceed with the Lion install.:) - Nick [/QUOTE]

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