RetroArch on MacOS Mavericks not finding bios files

Hi there. RetroArch is great but I am having trouble to get anything to work but for mame emulation roms.

I downloaded the Freeintv core and I have the recent bios pack in the folder that the bios folder setting points to. Yet when I try to execute astrosmash.int tells me that the grom.bin and exec.bin are not found. Yet I can see them in the system folder, in fact I put the whole bios pack there. The same things seems to happen with the gearcoleco core. I was able to get the same colecovision rom to work in blueMSX but I would really rather have everything centralized in RetroArch. Thanks for the help!

Is there a reason why these bios files would not be recognized? Thank you.