NEO GEO: Open source development kit
github.com
github.com
Currently your best bet is pc-2-neo on the Unibios: http://unibios.free.fr/pc2neo.html -- but it's a lot of work to get going and will only support (very) small ROMs.
Things installed on updated, fresh trusty32 VM: build-essentials, automake, texinfo, libmpc-dev, dependencies mentioned in repo
Might just give up and install on Mac but I use pkgin instead of brew.
sebastianmihai.com/main.php?t=22&n=Neo-Geo-development-Neo-Thunder