I just bought a new USB Mouse for my MacBook Pro, and it suddenly won't work. It will work fine on my brother's Mac, but will not work on mine. I have tried two other mice and neither will work. Checking in System Preferences>Mouse it says that it cannot detect a mouse. Help!
MacBook Pro, OS X Mountain Lion (10.8.4), Logitech mouse
Is your mouse listed in the USB Device Tree?
To see it go to: Apple Menu / About This Mac / More Info ... / System Report.
In the left hand column, under Hardware, select USB.
If the Device Tree does not list the mouse, try plugging in a different USB device - does not matter what - and see if that is listed.
Does this mean the USB ports no longer work?
That could be it. You could run a hardware test to verify.
On a pre- 2013 computer, this one:
http://support.apple.com/kb/ht1509
Or, on a newer Mac, this one:
http://support.apple.com/kb/HT5781
I ran the test, and it has seem to have solved itself! No idea what happened, but it's working fine now. Thanks for all your help!
It wasn't listed, so I plugged in a USB memory stick, and that didn't come up either. I also tried a keyboard - no success. Does this mean the USB ports no longer work?
USB Mice won't work, but will on another Mac. How do I fix it?
