Long time since this thread died, but for future forum searchers;
I borrowed a X-Rite i1Display (I guess its the same thing as the ColorMunki that
@lantau mentiond) from my coworker and used DisplayCal with it. Worked great! No trouble with licenses. And despite its age at this point (last release was in 2019) it still worked just fine with only minor levels of open source buginess
Display calibration and profiling with a focus on accuracy and versatility
I have an M1 Macbook pro 16" and the built in color modes made it really easy to dial in the white point and luminosity at the start, and then get a calibration that was really well tuned to that particular color mode.
edit: I couldn't really tell visually that there was some big change after calibrating. I'm sure modern mac book screens are fairly decent when they're new, but it's nice to know I'm working from a known baseline.