I've read numerous posts but none so far has done the trick.
How can I, on OSX (El Capitan Beta) install a gem for my own user? Posts suggest specifying
Permission denied @ rb_sysopen - /Users/Ne/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/speci
If you can't use
sudo, it sounds like you haven't initialized rbenv correctly because the shims aren't available.
These steps are from the documentation. Confirm you did them ALL:
Add ~/.rbenv/bin to your $PATH for access to the rbenv command-line utility.
$ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
Ubuntu Desktop note: Modify your ~/.bashrc instead of ~/.bash_profile.
Zsh note: Modify your ~/.zshrc file instead of ~/.bash_profile.
Add rbenv init to your shell to enable shims and autocompletion.
$ echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
Same as in previous step, use ~/.bashrc on Ubuntu, or ~/.zshrc for Zsh.
Restart your shell so that PATH changes take effect. (Opening a new terminal tab will usually do it.) Now check if rbenv was set up:
$ type rbenv #=> "rbenv is a function"