I have Mac Mini 2011 with Lion and using Magic Mouse with no problem. I bought wireless aluminium keyboard. It connects to everything (tried iPhone, friend's MacBook Pro with Snow Leopard), except from my Mac. It is recognized as a bluetooth keyboard, but when it comes to typing security 8digit code, it behaves like I haven't typed anything. I tried: Deleting from bluetooth devices and connecting again. Unplugging the old usb keyboard. Deleting com.apple.Bluetooth.plist Taking out batteries from the keyboard. Repairing disk permissions. Reseting the Power management system. Even reinstalling Lion. Nothing helped. Any ideas what is wrong with my computer? Thanks for any tips.