Hi,
the RIOT native target now builds and runs on OS X (tested with 10.8.3) in addition to being more reliable(*).
To test, checkout or update projects, boards and RIOT and run: $ cd projects/default-native $ make clean all $ ./bin/default-native.elf
The port is still lacking some important features like buttons and networking (although a dummy driver exists). On the other hand it has already proved useful to speed up development.
Please report any issues with the port you run into. Thank you in advance =)
Cheers, Ludwig
*) The previous context switching code has been rewritten to not change RIOT thread contexts from within a UNIX signal handler context but change the thread context after leaving the signal handler context and resuming possibly interrupted system calls. I suspect some new bugs might have crept in along with these changes, but in general it should be much more reliable.