How to Set a Different Volume Level for Each App on Your Mac
via lifehacker.com
Short excerpt below. Read at the original source.
By default, your Mac doesn’t allow you to control the volume levels of individual apps, something Windows has offered for years. If your alerts from messaging apps are too loud, you can either put the Mac in do-not-disturb mode to mute those alerts, or lower the system volume, but that’s it. It’s not ideal, since […]