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Apple Computing Products:
macOS - Notebook Hardware
New to me MacBook Pro Retina 13-inch early 2015 locks me out
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<blockquote data-quote="pincrete" data-source="post: 1929593" data-attributes="member: 307512"><p>No it had been already set up - I was wanting to install an older, rather than a newer system - for compatability with other Macs, but I never got as far as installing anything. It simply failed to boot to the external although that had a valid system on it.</p></blockquote><p></p>
[QUOTE="pincrete, post: 1929593, member: 307512"] No it had been already set up - I was wanting to install an older, rather than a newer system - for compatability with other Macs, but I never got as far as installing anything. It simply failed to boot to the external although that had a valid system on it. [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
New to me MacBook Pro Retina 13-inch early 2015 locks me out
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