[chirp_users] Mac driver issues SCU-18

Hi, I've got a Macbook Pro (Retina, 15-inch, Mid 2015) and a Yaesu SCU-18 cable. My version of OS X is 10.11.5 Beta 3, but I've had issues with 10.11.4 on up through Beta 3.

I've installed the Python Runtime from KK7DS, and chirp runs, but I can't select the driver for my cable.

I've tried a few drivers, but nothing seems to map to the /dev/cu.* I've tried the PL-2303HX Rev D Chipset http://prolificusa.com/portfolio/pl2303hx-rev-d-usb-to-serial-bridge-controller/ driver, and the FTDIUSBSerialDriver_v2_3.dmg driver, but neither seem to work.. Are there other drivers/sources I can try?

Thanks! Lee