Hi, I've written up some instructions on how to build the rumprun platform on Mac OS X. You can find them here: https://github.com/rumpkernel/wiki/wiki/Howto:-Set-up-a-Rumprun-toolchain-in-Mac-OS-X
The main difficulty compared to other host OS is the need to build an ELF compatible toolchain before building Rumprun. Please try out and/or comment on the above instructions. Matt
