Hi I have a 2011 iMac running the latest Mavericks. My Bluetooth Keyboard has stopped working on one user account, but works fine on the others (I'm typing this from my wife's account on the same computer). It is completely unresponsive from the login window on, I have to click 'switch user' to get to the main login options to choose my account so I can enter a password but after that nothing. The keyboard shows as connected. I have tried: Restarting the Mac - Nothing changed. Disconnecting the keyboard and re-pairing - This was odd actually, during the pairing it registered me typing the code to pair it but as soon as it was paired it didn't work again. I suppose if I can't fix it I can create a new user account and move everything across, setup my software again, remember all my passwords etc. etc. but that really isn't how I wanted to spend my entire Sunday. Can anyone think of a quick fix for this instead? Thanks in advance!!