I wouldn't worry too much. In order for the Mac to continue to serve as a development platform, it can't be completely locked down. They're making it clear thes

I wouldn't worry too much. In order for the Mac to continue to serve as a development platform, it can't be completely locked down. They're making it clear these days that they care a lot about the app ecosystem, so there will have to be a replacement before they take away the ability to install your own apps and get at the shell. More likely is that more of Apple's product line, and more of everyone's computing, will shift to iOs.