Steinberg UR12 Audio Interface

I moved my JUCE development app from my iMac to my Mac laptop. On the iMac I am using a Steinberg UR44 audio interface, I have guitar going in on channel 1 and out of the headphone jack and it is working. In the JUCE app I have the audio configured as follows:

    setAudioChannels (1, 1);

I am now trying to get the app and running on the laptop with the UR12, I can see in the Sound Preferences that I have a signal coming in, but I don’t seem to have any signal coming into the JUCE app. I tested the input signal coming into Sound Studio (a 2-track recording app) and it is coming into the Right channel, I am wondering if by default it needs to be coming into the Left channel. Any tips on debugging this?