Upgrading to latest redmine_git_hosting plugin on OSX

[smn-automation]

I'm upgrading a neglected Redmine 2.5 / redmine_git_hosting 0.6x into a more modern world (first the redmine_git_hosting plugin, and eventually get Redmine up to 3.x)

I'm currently stuck getting a rugged gem installed that passes the gitolite_config_test at
https:///settings/plugin/redmine_git_hosting?tab=gitolite_config_test
The only non-green on the entire page is ssh under "Rugged compiled features" (both threads and https are green).

Amongst the several github issues and docs I've looked at, I'm focusing here:
http://redmine-git-hosting.io/troubleshooting/
and the page it cross-refs to install the missing dependencies
http://redmine-git-hosting.io/get_started/#step-1-install-dependencies

I use homebrew on OSX (no apt-get or yum) to install packages, and I've brew install'ed:

libssh2

libgit2

libgpg-error

There is no homebrew formula for libssh2-devel or libgpg-error-devel.

Back to the troubleshooting page, I followed all the steps, once using
gem install rugged -v='0.22.2'
and once using
gem install rugged -v='0.22.2' -- --with-libgit2-config

I must be missing something obvious, but I cannot get that ssh to turn green...

Any ideas?

I LOVE this plugin in its previous incarnations, and can't wait to get the latest working.

[PowerKiKi]

As discussed in #732 (comment), issues related to Redmine < 4.0 or severely outdated issues are being closed to help clean up the issue tracker.

If this issue is still relevant to you and you are running Redmine >= 4.0, please open a new issue including all new relevant information.