Hey guys, I added the MacRuby framework to an existing project (gitx on github, which uses GC also fortunately). After setting the build to compile 64bit only everything (-1, see below) works fine, so far I can say now. I am impressed! I defined my own controller in Ruby, call methods of it from the user interface and connected this controller to other ObjC-objects and call methods of them. But one thing does not work: If I extend an existing ObjC-Object, f.e. class PBGitHistoryController def do_what(sender) puts "do what?" end end then I don't see this method in the Interface Builder under 'Received Actions'. Is it my fault our yours? If I 'p' this object it says: #<NSKVONotifying_PBGitHistoryController:0x8002bd820> Perhaps this (KVO) is the problem? -- But let me say again: I like the MacRuby project so much and I wish I could use it for real development in the near future! Bernd