Forcing MacOS to use both GPUs in macpro6,1: a theoretical opportunity or just a crazy idea?

Hi Guys,

Let me admit that my knowledge on MacOS structure is by far not advanced so, please, be clement and don't undervote me should this be a dumb question.

I have a macpro6,1 wonderfully running Sequoia 15.7.4 - thanks OCLP!!! :)
I recently read that Windows uses both GPUs natively, while MacOS leave the use of the second GPU to the app programmers.

I was wandering if it would be feasible to build a patch or something else that would enable the second GPU also on MacOS, and therefore to all apps... I understand this is a niche need and OCLP guys might never see that as a priority! Just wondering if it would be technically possible or if this would require to re-compile the whole OS or something like that.

Thanks in advance for your thoughts.