Mark, we photographers with our special needs are a drop in the bucket (maybe more like a single grain of sand on the beach) in terms of ultimate market size.
According to Apple's latest financials, the Mac platform itself is only a small portion of Apple's revenue. Total Mac sales are growing at about 14% per year but
iPhone and iPad revenues growing at rates of over %140 each year. Every year the Mac is becoming a smaller and smaller portion of Apple's revenue.
It's not that photographers are a drop in the bucket in terms of market size, it's that the entire Mac line is a drop in the bucket compared to the millions of consumers who buy iPhones, iPads, iPods, etc.