I want a diff format that allows comment, so I don't have to have two windows open side by side to read the developer's description of the patch while reading the patch, specially for removed vs moved code. And code review frontends to understand it (GH, GL, even RB!).
@nprofile1q... one thing I could think of is if Apple's sites use a certificate CA that has recently renewed their root, which means your old OS does not contain it, so it can't trus some apple sites or APIs.
Now, that doesn't mean Apple doesn't osoletes machines on purpose...