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Apple Computing Products:
macOS - Operating System
Problem creating bootable USB
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<blockquote data-quote="Rod" data-source="post: 1932711" data-attributes="member: 204485"><p>Perhaps you are not trying to create a bootable macOS installer. Booting from that would just display a window like Recovery Mode. If you are trying to actually install High Sierra on a USB that will not work either.</p><p>You could try creating a bootable clone of your existing 2011 iMac but again I don't <em>think</em> it would run on your 2020 iMac but I can't be completely sure. In any case it would be a good way of saving your data and OS on your failing 2011 model.</p></blockquote><p></p>
[QUOTE="Rod, post: 1932711, member: 204485"] Perhaps you are not trying to create a bootable macOS installer. Booting from that would just display a window like Recovery Mode. If you are trying to actually install High Sierra on a USB that will not work either. You could try creating a bootable clone of your existing 2011 iMac but again I don't [I]think[/I] it would run on your 2020 iMac but I can't be completely sure. In any case it would be a good way of saving your data and OS on your failing 2011 model. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Problem creating bootable USB
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