I have a bootable SD Card with Windows 10 installed, and it works fine in the most of macbook pro I have tested, but there is one in which when I press alt / option key, the SD Card doesn't appears and I can not find the reason. Why it works fine in one but not work in another one?.

All the computers where I have tested are MBP retina display late 2013

  • Have you tested the SD card reader of the anomalous computer? – perhapsmaybeharry Feb 18 '16 at 15:48
  • Yes, when the MBP is working, I connect the SD card to the card reader and it works perfectly. The problem is when I try to boot from it. – dperezac Feb 18 '16 at 21:42
  • That's weird. Have you checked if Recovery's Disk Utility can see it? – perhapsmaybeharry Feb 19 '16 at 1:05

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