To start playing with mixed Cocoa and MacRuby classes I created a Foo Objcetive C Framework containing just one class Roo: #import <Cocoa/Cocoa.h> @interface Roo : NSObject { float aValue; NSNumber *anotherValue; NSMutableString *aString; } @property float aValue; @property(retain) NSNumber *anotherValue; @property(retain) NSMutableString *aString; @end #import "Roo.h" @implementation Roo @synthesize aValue; @synthesize anotherValue; @synthesize aString; @end added garbage collection support and stated the public role of the header file then I copied the Foo.framework into ~/Library/Frameworks and MacBook:~ uliano$ macirb irb(main):001:0> framework 'Foo' => true irb(main):002:0> a=Roo.new => #<Roo:0x20009f520> irb(main):003:0> a.aValue=12 => 12 irb(main):004:0> a.anotherValue=150 => 150 irb(main):005:0> a.anotherValue/a.aValue => 12.5 irb(main):006:0> a.aString='Pancetta affumicata!' => "Pancetta affumicata!" irb(main):007:0> a.aString+a.anotherValue.to_s => "Pancetta affumicata!150" wonderful! isn't it? well not completely: I expected to find aValue, setAValue, anotherValue, ... in the list of methods of a but this is not the case irb(main):008:0> a.methods.sort => [:!, :!=, :!~, :==, :===, :=~, :Complex, :Rational, :__callee__, :__id__, :__method__, :__native__?, :__send__, :__type__, :clone, :define_singleton_method, :dup, :enum_for, :eql?, :equal?, :extend, :freeze, :frozen?, :hash, :inspect, :instance_eval, :instance_exec, :instance_of?, :instance_variable_defined?, :instance_variable_get, :instance_variable_set, :instance_variables, :is_a?, :kind_of?, :load_bridge_support_file, :method, :methods, :nil?, :object_id, :private_methods, :protected_methods, :public_method, :public_methods, :public_send, :respond_to?, :send, :singleton_methods, :taint, :tainted?, :tap, :to_enum, :to_s, :trust, :untaint, :untrust, :untrusted?] so I thought that it was just too magic that everything worked so smoothly without doing nothing, maybe to have the correct behavior something should be done with the bridgesupport metadata whom I know nothing and I tried MacBook:~ uliano$ cd /Library/BridgeSupport/ MacBook:BridgeSupport uliano$ gen_bridge_metadata -f Foo -o Foo.bridgesupport MacBook:BridgeSupport uliano$ cat Foo.bridgesupport <?xml version='1.0'?> <!DOCTYPE signatures SYSTEM "file://localhost/System/Library/DTDs/BridgeSupport.dtd"> <signatures version='0.9'> <depends_on path='/System/Library/Frameworks/Cocoa.framework'/> <depends_on path='/System/Library/Frameworks/CoreFoundation.framework'/> </signatures>MacBook:BridgeSupport uliano$ not a clue about any method! I'm stuck here. How can I have Obcjetive C methods "visibile" from MacRuby? uliano