I'm Karin! 
I keep a very close eye on the readme's (even following their changes on github), and I've tried using rc10 but if I recall it had no effect on this bug on Macs, so I instead include the latest libusb in my builds.
Kano makes it sounds like the error confidently lies within libusb, so I'll do a full spectrum of tests with various libusb versions. If I can find a version that works I will update cgminer for Mac OS X and Asteroid (my Mac GUI to cgminer) accordingly.
Otherwise, we'll have to dig deeper into libusb, and any errors generated from cgminer (and what the community can help with) would be our best bet in figuring out the issue with libusb + Macs. I'll try and do these test builds tonight and will post back with what I find.
I appreciate it! Let me know if you figure anything out. I'd be happy to help in any way I can and/or send you a small tip for your time as I'm basically sitting dead in the water until I can get this sorted.
I keep a very close eye on the readme's (even following their changes on github), and I've tried using rc10 but if I recall it had no effect on this bug on Macs, so I instead include the latest libusb in my builds.
Kano makes it sounds like the error confidently lies within libusb, so I'll do a full spectrum of tests with various libusb versions. If I can find a version that works I will update cgminer for Mac OS X and Asteroid (my Mac GUI to cgminer) accordingly.
Otherwise, we'll have to dig deeper into libusb, and any errors generated from cgminer (and what the community can help with) would be our best bet in figuring out the issue with libusb + Macs. I'll try and do these test builds tonight and will post back with what I find.