Thanks for your feedback.

Unfortunately, WCRB is known for having an extremely weak ERP; I would have to recommend an amplified antenna to pull the analog signal. At this time, I cannot picture any hardware mods to the Model 975 for HD Radio.

In regards to the updater, when we release updates for the Model 975, we supply a USB to RS-232 free to our customers with previous firmware versions. There is a Mac version of the software loader; the requirement being OS X 10.9 or higher.