trackpad clicking not working - solved
For the trackpad in place of the mouse.........
After trying everything listed - new batteries, looking for the screw, calling apple, looking for water damage, etc.... I looked at my trackpad from the side and realized that it was slightly bent... i GENTLY straightened it out and Boom Done. Trackpad click fixed.
Crazy, but it worked immediately. Just make sure you turn it back on after you take out the batteries.... couldn't figure out why it wasn't connecting even though the click was working.... : )