Works fine here (although I'm on Windows). Are you sure you have the required ingredients and have selected the option in the pie menu with your hammer?
The thing is, I can't get the pie menu to even come up! I've tried all of the keys and it never shows :/ I've read the attactment that explains all of the keys and it doesn't work.
I figured out the problem. I had to purchase a wireless mouse in order to use the right button on the mouse becasue the mac treats it as if it were a normal mouse. Thanks!