Why You Should Upgrade (On Your Own Terms)
I know many of you are tempted to scream, “Stop this bus! I want to get off!” And many people did just that some years back when the misbegotten OS X 10.7 Lion was on offer — there’s a vocal group still happily (or at least defensively) using 10.6 Snow Leopard. There’s probably still a set of iOS 6 users holding out against the flat look of iOS 7 and iOS 8 too. None of you are wrong. You may be merely postponing a world of upgrade hurt, but you’re not wrong.
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I’m not saying that you should drop everything to upgrade as soon as Software Update alerts you to the latest and greatest. In fact, apart from certain security-related updates that would be good to get sooner rather than later, I think waiting a decent amount of time before upgrading makes a ton of sense. Immediate upgrades are for those of us whose business revolves around the latest details — we’re the penguins diving off the ice floe first so the rest of you can jump in without worrying about leopard seals. Wait a bit after a major upgrade, and for a minor update or two to address bugs that became obvious only after widespread public release. We may have early-bird releases of “Take Control of Upgrading to El Capitan” and “El Capitan: A Take Control Crash Course” available now, with updates planed for El Capitan’s release day, but we also continue to refine those books after launch.
So wait if you want, but don’t wait too long. Community knowledge doesn’t go back that far any more — there’s just too much to know, and too many facts that quickly stop being relevant. Options disappear too — drag your feet on upgrading to the mature Yosemite now, and in a month or so, Apple will replace it with El Capitan, and you won’t be able to download a fresh copy of Yosemite, just as you can no longer get a new copy of Mavericks from the Mac App Store.