My trackpad isn't working, and I'm not sure why, s I was wondering if someone could help me with this. I had plugged in an external hard drive via USB, to see if it was working or not. I knew it was bootable, so I restarted the MacBook, held down the option key, selected the external drive, and found out that it was not working as I suspected. As it was stuck on the gray Apple logo screen, I had to hold down the power button to restart. I went ahead with booting via my internal drive (which was working perfectly fine, by the way) and at the login screen, discovered that the trackpad wasn't working. I'm completely reliant on the trackpad and don't have a mouse to use, so help is needed!