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Not quite. They got a handle on security when Linux list a fire under their ass.
Competition, true honest to market competition, spurs improvement.
The thing about Apple is that they may have competition on hardware, but they have no competition on Software.
If you buy a Mac or a iPhone, you have already thrown money at Apple. But you can easily assemble a PC without Windows and then install Linux on it.
Keep in mind that the latest US warship is not running Windows, but RHEL. That is a very big wake up call for Microsoft, where before we have seen the likes of Win2k (US ship) and XP (UK submarine) used around the world.