Plugging USB hard drive put my Mac to sleep I just plugged a USB hard drive into my MacBook Air and for some reason it immediately went into sleep mode (it also stopped the music I was playing on iTunes). What could be the issue? Is it something I should worry about? I just tried to plug it in again but nothing weird happened, the drive works fine.
This can happen if for some reason it pulls more power then the computer can handle.  If this happens only once, I wouldn't worry about it too much, however if it becomes a repeat issue, it could mean there is a problem with the power regulation, the USB port, or both.