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If a USB device is plugged or unplugged, my MacBook Pro wakes up from sleep. Can this behavior be changed somehow? That is to say, I do not want my Mac to wake up when a USB device is unplugged.

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The reason why the Mac awakes is because the USB device is drawing power from the Mac’s USB port. When you disconnect it, there’s a change in the voltage and the Mac awakes (same goes when you plug one).

Curiously, there’s a way to do it in Windows.

According to the guys at Super User, this is not possible on a Mac. At least not that we’ve discovered yet.

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  • What a bummer... This is annoying, especially when I'm charging my phone from the Mac and then put the Mac to sleep but forget to unplug the phone. – Pawel Krakowiak Aug 9 '11 at 5:59
  • @Pawel in Lion I think that the display stays off now, which is something. :p I'd have to do some more testing to confirm this. – Martin Marconcini Aug 9 '11 at 11:22

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