I Couldn’t Eject External Drives on My Mac, Here's How I Fixed It

Do this before you yank the drive out in frustration.

I Couldn’t Eject External Drives on My Mac, Here's How I Fixed It

Ever tried to eject an external drive, only for macOS to tell you that it's still in use when you're absolutely certain that it isn't? It's a common and annoying problem, but is fixable. Here's how I did it.