If after all this we can look at running in depth hardware diagnostics.įirst and foremost, keep in mind that sometimes a USB device itself can fail, which may have nothing to do with the Mac itself. I’d start over, go through all of this to see if you can reset. I’m wondering if the keyboard problems have prevented complete resets. This will tell you if it is a software issue.
Next start up in Safe Mode by holding down the Shift key on start up. Now you can independently test both the keyboard and mouse. Start with disconnecting the mouse and plug it straight into a USB port.
