Just a curiosity thing. I haven't installed Arduino + RFduino on my new mac machine until just tonight. To my surprise, pulling 1.5.5 R2, I get a error stating that the gcc-arm-non-eabi-4.8.3-2014q1... could not be found. My other machine has this same arduino build but a different version of rfduino. The whole installer was slick, it would be a great process for RFduino (instead of having to open up the .app file and put it in just the right place)
I've noticed changes don't happen very fast with RFduino unfortunately. Have a technical question out to the Simblee team but no response yet. I'm sure they're swamped.