Yes, I just confirmed. I followed @goldilocks suggestions and I'm no longer getting the locale warnings, but I still have the vncserver problem.

Do you recommend adding export LC_ALL=en_US.UTF-8 to someplace like the .bashrc file?

You'll also need to install software on your client to get this working. On OS X: brew install gstreamer gst-libav gst-plugins-ugly gst-plugins-base gst-plugins-bad gst-plugins-good

What language are you planning on doing development in? What kind of software are you planning on writing?

I think the problem here has nothing to do with locale, it has to do with trying to use Apple Screen Sharing. Apparently it is possible, but it is complicated. The recommendation from RPi is to use realvnc. See instructions here: raspberrypi.org/documentation/remote-access/vnc/mac.md

I'm still seeing the -bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8) error message after following these instructions.

@GeorgeProfenza You should expand your response to a full answer.