Black bars when I hook my macbook up to my tv
About a week ago i finally updated my Macbook Pro. After doing so I have experienced a problem when I hook my Macbook up to my tv. I connect my Macbook to my tv(it's a Sharp Aquos tv) using a VGA adapter. I used to be able to do this with no problem. Now when I do it(after the update), my screen turns into a square and I have black bars along the side. I've tried system preferences > display > etc. but I can't seem to figure it out. HELP!
MacBook Pro