Touchpad "click" does not work
I have a MacBook Pro (Retina, Mid 2012). The "click" function of my laptop's touchpad stopped working. It still tracks my finger movements and it does the right click. I had to plug in a mouse to make it work. I started the computer in "safe mode" and it works fine, but when I reboot it stops working again. I have disconnected all peripherals. What should I try next?
MacPro1,1 Dual-Core Intel Xeon 2.66 GHz, Mac OS X (10.5.5)