Last year, I had a version of MacDoomLegacy working with Mac <-> Mac network support (I don't have a PC with which to test) and I had to do some byte swapping in the mserv.c file.  Would it be possible to move that file into the OS specific folders?  Unfortunately, I cannot find my sourcecode with all the changes so I can compare it with the new code.  I sent the changes to the netcode to Calum (who worked on the Mac port) but I'm not sure if he still has them.  I haven't had time to check the files, but the changes I made were specific to the Mac port (byte swapping issues).  However, I'm not sure what work Calum has done recently.