I do wonder what Apple will do if this gets any sort of traction. I fear they only allow disabling of secure boot/other OS installs due to fear of regulation. Apple wants you running their OS and in their walled garden.
I don't know, when they were on Intel they went out of their way to support dual-booting with Windows.
Maybe if 20XX really does become year the "year of desktop on linux" they'll start to get worried? But for now it seems like an easy calculation that it only benefits Apple to allow easy dual-booting to Linux -- it makes their hardware more appealing to the hard-core geek crowd (w/ disproprtionate mind-share and knock-on effects), while still having essentially zero chance of Linux cannibalizing your every-day user market.
Apple is at no risk of having Linux stealing their users away. Unless someone makes a business of reselling Macbooks with linux being preinstalled and in some magical way that business becomes immensely successful.
Nothing. Most Mac users are not buying from Apple to run vendor unsupported OSs. It really doesn't matter to corporate Apple what is going on other than to make sure technical documentation isn't leaked.
