Hello, I've attached a patch that allows OCaml 3.08.2 to build using the TclTkAqua frameworks from http://tcltkaqua.sourceforge.net instead of an X11 version of Tcl/Tk. To use it, apply the patch and configure ocaml with "-tklibs '-framework Tcl -framework Tk'". The changes are very simple: #include --> #include #include --> #include This is enought to allow ocaml to build, but the labltk examples won't work as expected. The OS X window manager requires graphical apps to be launched from within an application bundle, so you'll need to use something like Platypus to package your program. Cheers, -n8 -- >>>-- Nathaniel Gray -- Caltech Computer Science ------> >>>-- Mojave Project -- http://mojave.cs.caltech.edu -->