If you're still recovering from Apple's last OS update don't worry: These changes are nowhere near as huge as last year's move to iOS 7 -- a radical redesign of the iPhone interface and one of the biggest moves Apple made post-Steve Jobs. Some iPhone people appreciated the modern design. Others complained of the new look, and some even reported that the design gave them motion sickness.
This year's changes won't make you ill. And, some of them are pretty much irrelevant. Here are the ones that you must know about: