How to customize the brightness and volume of macOS to the fullest extent possible
Initially, the macOS operating system allows you to adjust the screen brightness and volume within 16 degrees. In most cases, this will be enough, but sometimes you need to adjust it more finely.
For example, if the minimum volume threshold has to be set lower or the first division of brightness is too bright.
How to fine-tune the brightness and volume
To fine-tune the parameters, just remember the Shift + Alt (Option) key combination.
By pressing these buttons together with the volume control keys (F11-F12), you will get a more precise adjustment of the sound, and together with the brightness control keys (F1-F2) – additional values of the parameter.
Each of the 16 standard values will be divided into 4 additional values. Get as much as 64 gradations to adjust the sound and brightness of the monitor backlight.
That’s exactly enough for any Mac user.