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Macbook Pro USB drives not detected

0 votes
asked by about USB Backup

Macbook Pro 10.7.5 isn't detecting USB flash drives.
Six different USB flash drives.
Preferences set to "auto-detect" and display external drives are not working.
Have rebooted (soft and hard reboots), tried to reset the SMS by following the
prescribed sequence: sleep mode --> restart --> shut down
no change

1 Answer

0 votes
answered by (800 points)

Try USB Prober. It's installed with Apple's Developer tools, but you can also download it from this site: http://touch-base.com/documentation/USBMacProber.htm

If that doesn't work, it's probably a hardware issue.

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