I've got a Macbook pro that I bought in 2009 and I'm trying to figure out why it occasionally keeps getting stuck on right click when I use my trackpad. It won't let me left click at all. And if I try to scroll while this is happening, the page just zooms in and out instead of a regular scroll. Even when I try to go to the desktop, I can't do anything but move it around like its a picture or zoom in and out. The only thing that helps is to do a restart. Why is it doing this?