Does Mac have an display driver to go for higher resolution (than the current display)?
Apple, generally does not release drivers other than what ships with OS X. And video card manufacturers generally do not release drivers for their devices installed in a Mac under OS X unless it is a PCI card or some such that has a chipset not specifically supported by OS X.

I suppose the Hackintosh community may have some drivers that do that but I would tend to think that what you are looking for is not available under Mac OS