Help! Stuck on hand tool!

For so long my Photoshop has been cursed to stay stuck on this useless hand tool, no matter what button I press, how often I rest, or threaten to pour water on it will not budge. I am desperate to get free from this blasted tool and begin to get back into work, as I must now study from home I can no longer advoid this problem. 

I have done everything as told to me by other people online, so please don't say 'Press the keybard' because it just does nothing but annoy me further. The keybare is fine (because how else am I writing this plea for help?) so I don't know if it is somthing within my mac book that's at fault.

Please, please help me solve this issue before I frizzbe this laptop out a window.