Sorry Andrew. With a Mac, you can't post via KA72 yet. If you haven't have GPS-Results or GPSAR-Pro (for reading UBX), you can post to GPSTC manually only.
Most of my testing of the Motion has been directly with a Mac, It connect really well and does FW updates easily and even config changes (caution

) but I have to send the data to Windows for some analysis in various programs.