Looking for serial for Tomb Raider Underworld for Mac OSX

Hello! So the title says it all. Looking for a key for Tomb Raider Underworld for Mac OSX.
The version I have used to have a working crack for it, but the crack doesn't work with newer versions of OSX so I just need a good old fashioned serial key for it. (It needs to be a Feral DRM Product Key, not a Steam key) Thank you!