No Unity games open / run

Hi all,
Not sure if this is the right place to post this but;

I’ve installed and tried to run 3 different Unity games on my Macbook Pro with OSX 10.6.8 and none of them open.
There’s no error message or appearance in the dock at the bottom either.

Am I missing some crucial software?

The three games i’ve tried which all act the same are: Slenderman, Low Light Combat and Receiver.

Appreciate any tips
Cheers

Probably not the right place. But… Go to Applications/Utility/Console, and look at the unity player log to see what error it is getting.