They don't make a ton on Mac's, but they do on iPhone's. Here's an article on their latest quarterly earnings: http://www.extremetech.com/computing/181290-apples-iphone-continues-to-drive-record-quarterly-profits-despite-ipad-sales-stalling
iPads are also still big business, even though in this most recent statement they were actually down (I think for the first time ever) - but still, they're VERY profitable. From the same article, regarding iPad:
It’s worth pointing out that sales of 16.35 million is still very, very strong; no other tablet comes close.
I wasn't even getting into the prospect of a Lightning standard, but since you brought it up - honestly do you really think they would eliminate a headphone port COMPLETELY? That would SERIOUSLY piss off (and alienate) a HUGE amount of their customers who wouldn't be able to use ANY of their current headphones. I cannot see them ever doing something so radical. What is more likely is that they'll build in exclusive functionality or advantages when using Lightning, especially in conjunction with Beats headphones. Incentivize that while still retaining the most common standard that EVERY headphone uses is the best of both worlds, and everyone wins.
Edited by thievesarmy - 6/9/14 at 6:38pm