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I asked this already. Someone told me to reinstall the OS, I did that, and it worked, but when I go to upgrade to High Sierra it still does not work. Can anyone help?!?!?
This is crazy, I though Apple made things simple?!
MacBook Pro with Retina display, macOS Sierra (10.12.6)
You should contact Other World Computing (OWC), the vendor of Aura Drives, for assistance.
OWC has a help article that refers to a firmware update for certain of their drives:
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You may not install this volume because the computer is missing a firmware partition
