It used to be that having Windows expertise was an advantage and being a Mac user put you in a severe minority. It was hard to find a job where you were allowed to use a Mac never mind where you got to be surrounded by other Mac users.
But oh how the times have changed. Macs are more popular than PCs at universities, at many technical conferences, with celebrities, even with newscasters on CNN. If you are giving a presentation at an O'Reilly conference, you can expect to see an army of Apple logos staring back at you.
Have we crossed the cusp? Is it a disadvantage for a technical person who doesn't know Mac? Are your job options significantly wider if you are comfortable on both Mac and Windows?
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