Apple's Mac OS is the training bra of OSs, and their mobile devices are very minute derivatives of each other that give you absolutely no level or real customisation outside of your apps and wallpapers. Their computers are locked to certain hardware unless you go custom, but most people won't do that, because Apple knows its target audience are the technologically-impaired.
Idk, I disagree. Right now I'm sitting in my apartment with my MacBook Pro plugged into an Apple Thunderbolt display. If I drive to my parents house and turn on my desktop there, it'll boot into Arch Linux by default but with options for Windows and even my own homemade operating system.
I like Mac OSX because of how powerful and convenient it is. It easily integrates my life. If I'm in class on my laptop and the professor says there's going to be a test in a week, I can add a quick entry into my Calendar app with a reminder to study the day before. Then I go home and plug my laptop into a monitor with 1 cord, suddenly everything on my desk jumps to life as it's connected to my laptop. No need to plug a bunch of USB devices in every time I get home, they just plug into the monitor and then the thunderbolt cord can support all of their data at once through one port on my laptop. Then I'm out getting coffee somewhere a few days later, and my phone buzzes in my pocket. There's that reminder I put into my computer to study for the test -- only it's been seamlessly linked to my phone. I start up a text conversation with a friend asking him if he wants to have a study session, and when I get home I can resume that conversation through the iMessage app on my laptop seamlessly -- all our previous messages are already recorded there.
Mac OSX is also a fully POSIX compliant Unix operating system. This means that from my (a programmer's) perspective, programming is straightforward and things perform reliably, unlike Windows where nothing makes sense and it's a roll of dice whether your code will work -- sometimes it'll even work for no reason at all. I don't play many games, but most major games (and all the ones I play anyway) support Mac OSX, so there's no need for me to use Windows for gaming.
Basically, there's no reason why a technologically advanced person such as myself can't enjoy the seamlessness of Apple's design. I can't think of any other companies that have so well integrated their products that it feels like wherever you are, all your important things are with you.