Hi: I've no Mac experience and currently run f16 but here are a few comments.
The rpmfusion and atrpms packages are generally believed incompatible. If you try one, remove all traces of the other - lib packages too.
I use ATrpms; the nvidia-graphics package should pull in nvidia-graphics-helpers, nvidia-graphics302.17, a kmdl and a libs package, and maybe nvidia-graphics-devices too.
I don't think the nomodeset kernel option has been needed for some time, although it probably gets set automatically.
You may need to run, as root, /usr/sbin/nvidia-graphics-switch.
This may be needed too (from the f16 package description):
Add ModulePath "/usr/lib64/xorg/modules/extensions/nvidia" ModulePath "/usr/lib64/xorg/modules/extensions" ModulePath "/usr/lib64/xorg/modules" to `Section "Files"' in the config file and remove/comment the dri module.
HTH
John P