As far as the CPU cores go, yes, there isn't much to distinguish them there.
There is no way in the foreseeable future that Nvidia will license their GPU designs to anybody.
The only way you'll see Nvidia IP on an Apple box is if Nvidia-made chips are in there, but Nvidia will require buy in on the rest of their software stack. But Apple won't want to cede that much control of their platform to Nvidia.
Nvidia already had tremendous reach, they don't need Apple.