Installing Jekyll on El Capitain 10.11
I am currently moving my blog to Github and Jekyll. On my iMac there were no issues installing Jekyll, but on my MacBook Air it errored trying to install files in /usr/bin/. There was also a single threading warning on my iMac so I updated the gem installer first on my second install. This may have caused the MacBook Air issues.  So I am noting this here for my future reference and including a link to the solution at the bottom of this post.
Update gem:
sudo gem update --systemInstall Jekyll to /usr/local/bin:
sudo gem install -n /usr/local/bin jekyllThere are also Homebrew install instructions, but I really wanted this setup with a “normal”  Mac install since I don’t use Ruby for anything except Jekyll at the moment.
Jekyll Install troubleshooting OSX 10.11