Hi Joseph, I'm no expert, but, I managed to install Juno on Mac OS X 10.9 with no problem. Have you tried installing Julia first then Juno. If you and your students are working on Apple Macs I would recommend installing Julia via Homebrew because it then becomes easier to maintain any available updates.
An alternative approach is to install LightTable (after Julia) and then add the Juno package from within LightTable. Also, don't forget to run Pkg.update() from the Julia repl before running LightTable. This is the method I use on linux and Mac because there was a problem with Juno for me on linux. I think it was because they do not provide a fedora version or a generic linux binary. The only difference between Juno and LightTable is at the start up but essentially they are exactly the same. This approach is also more flexible since it works on all flavours of linux, OS X and Windows. I hope this is of some help, good luck.
