This is a pretty great overview about how to use sops-nix!

ApplePi-Baker, a free macOS utility to Backup

Found this because I was trying to understand why the Nix Darwin was asking to “install a helper tool”. It’s the fact that Apple has this https://developer.apple.com/library/archive/documentation/Security/Conceptual/SecureCodingGuide/Articles/AccessControl.html tool now to improve macOS security