Mac; Colour Settings

Situation:
I'm using a Mac. I've tried configuring the gamma settings as I read in previous posts. I don't think the problem is with my computer, but with photoshop.

This is what the picture differences are like right now:
Please tell me if this needs to be put under a cut. One comment will be enough, thanks :)


http://img110.imageshack.us/my.php?image=picture3sp8.png


Thanks so much in advance♥