Krita does a decent job but for my workflows I definitely want the Photoshop plugin.
I would imagine MacOS has a harder time with generative fill, you'd be using Adobe's and not Stable Diffusion (which I'm pretty sure if what these non-Adobe plugins all run from).
I mean, if there's a way to get a stable diffusion server running for you and then you... no I had to look it up, I think this looks like your best bet and even then... I'm not sure