What can I do if the device is not recognized by a Mac computer?


There may be issues on recognizing USB devices, including MP3 / MP4 players, by a Mac computer after the OS is upgraded to version 10.7.2 . This can be solved by resetting PRAM (Parameter Random Access Memory) of the computer:

  1. Shut down the computer.
  2. Locate the following keys on the keyboard: 
    • [Command]
    • [Option]
    • [P]
    • [R]

  3. Turn on the computer.
  4. Before the gray screen appears, simultaneously press and hold [COMMAND], [OPTION], [P] and [R] buttons until you hear the second startup sound.
  5. Release the buttons.

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