免费！！支持调节每个显示器的亮度，支持快捷键：
Control your display’s brightness from the macOS menu bar!
– Smooth brightness transitions.
– Support for custom keyboard shortcuts.
– Several customization options.
– Modern, stylish customizable menulet reflecting the design of Control Control introduced in newer macOS versions.
– Simple, unobstrusive UI to blend into the general aesthetics of macOS.