I'm not sure Linux is the comparison point you want for "handles high resolution consistently with various monitors." I'm sure I could mess around with settings

I'm not sure Linux is the comparison point you want for "handles high resolution consistently with various monitors." I'm sure I could mess around with settings to get any behavior I want, but I've been wrangling multi-monitor high-res setups on Linux for over a decade and it's never been better than OS X's monitor handling. They both have plenty of issues.