Support for external refresh rates

[GavBeats]

这个问题是否源自某个缺陷？如果是，可于此处描述一下 | Is your feature request related to a problem? Please describe. When I am using a external display above 60hz on my macbook air I can tell it is not running at my external's native refresh rate of 75 hz

说说你的新点子 | Describe the solution you'd like Mos matches monitor refresh rate.

还有别的替代方案吗？ | Describe alternatives you've considered

额外说明 | Additional context