Look at: http://www-2.cs.cmu.edu/afs/cs/project/mach/public/www/doc/tutorials.html#pr... Its the reference I used in doing my MIG RPC work. And your use of header files is wrong I believe. You never want to add header files to /usr/include/sys (or /System/Library/Frameworks/Kernel.Framekwork/Headers/sys either). You make a .defs file which describes your function calls and then the "migger" converts them to C code for your client and server portions, write some incantations that links it all together into your RunLoop and off you go. --- Marek Kozubal marek@portents.com _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.