I just resumed work on maintaining SPITBOL since the release of the OSX version in June 2015.
Turns out that was more than enough time for Apple to change the basic C-compiler/library tool chain so SPITBOL can no longer be built.
Though I will try to fix this as time permits, in the interim I suggest OSX users try VirtualBox, which supports running Linux on OSX. For example, I was able to install Linux Mint, my preferred Linux distort, on OSX in a short time, with no glitches. I was also able to compile the latest version of SPITBOL with fixes for DATE() and the elapsed time function (systm.c)
PS: I also tried Parallels Desktop for Mac. It works, but offers only limited graphics resolution for OSX. VirtualBox does a much better job, and it is free, while Parallels Desktop isn’t.
Tuxer's
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