Change Volume More Precisely
We have another little-related volume shortcut that may just blow your mind. If you’re a Mac user, you’re familiar with the little “bars” that represent volume. One “click” on the volume up or volume down keys translates to one “bar.”
But you can actually change your Mac’s volume much more precisely. Just hold down Option + Shift and press one of the volume icons. You’ll see the volume get higher or lower in smaller increments. Basically, you’ll be changing the volume by a fraction of a bar.
Note that this trick doesn’t appear to work on MacBook Pro devices with OLED Touch Bars, but will work with connected Magic Keyboards.