If dual boot is used to run a second macOS installation off a different volume on the same hard disk, and that volume is encrypted, booting the first macOS will prompt for the encryption password for the second volume on each boot. However, there is no need or desire to mount the second macOS volume from the first macOS. How can this prompting for the encryption password be disabled?
The solution needs have been verified working on macOS 10.12 Sierra specifically.