I agree people should be employed based on merit, but I don't think that means it isn't valid to look at a break-down of how diverse the employees are in terms of things like background, race, ethnicity, sex and gender, or any other difference that is part of the prejudices people face in life.
I don't think companies should necessarily try to map their staff to national statistics - for example, there may be a greater percentage of people of working age in minority races than retired white people, as just one example. Maybe there are more asians as a product of highly technologised asian culture. It's a complex issue that can't be accurately reduced to a couple of columns of numbers. Everyone is different, in thousands of ways.
Also, given the training and demands of many of the staff that Apple employs, the meritocracy argument only stretches as far as who can do the job once it's been given - not always how much they know upon an initial interview. What I believe should be equal is the opportunity to everyone, regardless of colour or any other difference. From that point the employee must prove they have the skills, of course.
I think pay equality is something to be lauded. As it says, it's for similar roles, where the only difference is sex or gender. Implicit in that is all those employees are doing the job capably (or else all are failing equally!!).
I absolutely get the meritocracy argument on an ideal, philosphical level, but it isn't that simple, because white men have been in control in western society for so long, and have shaped the social structures we live in and by to the point where it isn't enough to just say 'well ok from now on there won't be any prejudice in any way just because we, the white majority, have said so'.
It isn't enough to just say it. It should be tested, and analysed, at least as a starting point for a continued conversation. It doesn't mean the workforce of any company should have to match the demographics and backgrounds of the nation in general 1:1, but I think it's important to even recognise that equality of opportunity (as opposed to the idea of 'positive discrimination' which I think is often not all that positive) is something that should be consciously looked at and worked on.
TL;DR version - this is a positive thing and it doesn't mean people aren't being employed based on merit, it just means everyone getting a fair shot at proving they have the merit.