IIRC MacRuby used to compile to native code on OSX using LLVM, and was supposed to support native OSX APIs and Objective-C frameworks. It always seemed like a neat idea, and a slick integration, but I guess Apple moved to Swift instead. I'll have to pick up a copy of this "Ruby Under a Microscope" book when the new version comes out. I've always liked Ruby, I just haven't had much chance to use it.
Typical. I may get absolutely destroyed for this, but being professionally proficient in a ton of languages, including Ruby and the ones I mention below, and the ones I'm about to mention: This sounds like Microsoft when they moved from VB6 to VB.Net. At least they have a good thing going with C# though. VB6 was quite an interesting beast. You could do basically everything that you could do in languages like C/C++, b…
I do agree it'd be interesting to have a GUI designer for Ruby. Does QML paired with QtRuby work?
In the distant past I had a book about FXRuby, but never used it much, and don't think it had a UI designer - it was just bindings to Fox Toolkit, which is lightweight, but not as well maintained as Qt or Gtk.