[Jtsummers]

There were alternatives to Windows on IBM-compatible PCs, but MS actively worked to block them in the marketplace. MS also actively worked to block competitors who would break platform-centric software via things like (as Netscape was after) creating a platform-agnostic software delivery platform.

It's also important to note that the FTC doesn't actually care about monopolies in all cases. They care about monopolies that arise from abuse and anti-competitive behavior or that are used to abuse consumers and competitors.

Show that Apple is in a monopoly position (as a player in the mobile hardware/software business space) and that they got there by way of anti-competitive behavior. Or that they've abused this position to artificially control pricing and other things. That's what needs to happen to establish an anti-trust case against them.