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Apple Computing Products:
macOS - Notebook Hardware
Blinking Question Mark - Mid 2009 MacBook Pro
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<blockquote data-quote="krs" data-source="post: 1849325" data-attributes="member: 67742"><p>In addition to the replies already posted....</p><p></p><p>A flashing question mark means that the Mac can't find a valid OS to boot with.</p><p></p><p>Do you not have an external bootable backup you can use to boot?</p><p></p><p>You said you made a bootable USB flash drive and tried that - this should normally work, however you stated: </p><p></p><p></p><p>I have seen many posts here in this forum where a bootable USB flash drive made using TransMac <strong>does not work</strong>.</p><p></p><p>I think you need a proper external device to boot from and then see what happens.</p></blockquote><p></p>
[QUOTE="krs, post: 1849325, member: 67742"] In addition to the replies already posted.... A flashing question mark means that the Mac can't find a valid OS to boot with. Do you not have an external bootable backup you can use to boot? You said you made a bootable USB flash drive and tried that - this should normally work, however you stated: I have seen many posts here in this forum where a bootable USB flash drive made using TransMac [B]does not work[/B]. I think you need a proper external device to boot from and then see what happens. [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
Blinking Question Mark - Mid 2009 MacBook Pro
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