I'm using MacRuby to test some of my ObjC classes. I was wondering if there was a canonical way to monkey patch these classes. Consider, the following where Cell is an ObjC class: irb(main):001:0> Cell.object_id => 4387749088 irb(main):002:0> class Cell irb(main):003:1> def whee irb(main):004:2> p 'whee' irb(main):005:2> end irb(main):006:1> end => nil irb(main):007:0> Cell.object_id => 4388625216 I would expect the object_id to stay the same, e.g. using pure MacRuby: irb(main):010:0> class Bar irb(main):011:1> end => nil irb(main):012:0> Bar.object_id => 4298834304 irb(main):013:0> class Bar irb(main):014:1> def drink irb(main):015:2> p 'tasty!' irb(main):016:2> end irb(main):017:1> end => nil irb(main):018:0> Bar.object_id => 4298834304 Thanks Clay Bridges