Tier-1 Platforms
macOS
This is the most popular developer platform, and there are two widely used package managers:
Homebrew
MacPorts
Both of them accept PRs for new packages, and ocaml and opam are both packaged up there and reasonably regularly updated.
To create a binary mpkg installer for osx, which lets the binaries be signed and distributable through the App Store. This is an attractive option if we have a teaching environment (GUI) in the future. The Packages tool is a good way to create a Mac GUI.