Actually, Apple's PC business has never been better. They sold 5,198,000 Macs last quarter, a record. Mac sales are up 26% compared to the same quarter last year. Of course they sold 37 million iPhones, but the amount of revenue the Mac generates isn’t small by any means.
I don’t have a problem with them not shipping software that’s incompatible with how they do business; I suspect hackers and other clueful users will continue using the available tools like Homebrew to install whatever they want.