Technology is complicated. No doubt about that. For instance, do you have any idea of the machinations your computer goes through every time it boots up? It’s an orgy of different systems and pieces of hardware, each and every one of which has to work perfectly or all you’ll end up with is a sad, non-functioning system.
For example, here’s Apple’s extremely high-level guide to the Mac OS X boot process. When you bring the hardware into the process, it gets way, way more complicated. But this post isn’t about the complexity and intricacy of modern computers, it’s about the human response. Whether you know what’s really going on inside your computer or not, you know it’s complicated as all get out, and that Men With Beards get paid a ton of money to make the magic happen.
Which subconsciously causes a lot of people to exist in a state of angst about their computers. Man, if that puppy blows up, I am screwed.
And what do humans do when exposed to complicated systems we don’t understand? That’s right. Go cargo cult.
My computer stopped working after I updated it. But then I performed an update after repairing permissions on my hard drive, and it worked great. Therefore, repairing permissions must be something to do before every system update.
Google around on the Internet and you’ll find myriad statements like this. To be honest, it’s really depressing. Because it’s nothing but magical thinking—I found something that worked, and therefore that must be The One True Way. It’s post hoc, ergo propter hoc writ large, all over Internet.
Remember, computers are nothing but logic machines. There’s nothing magical inside them. Not even a drop of unicorn tears. All physical processes, all completely understood by engineers.
So whenever some random person tells you that you must do X before you update your system, they are victims of cargo cult mentality. What you must do before installing any kind of update is what the manufacturer tells you. No more, no less. And the software manufacturers spend a lot of time and energy making sure you don’t have to sacrifice any chickens before updating.
Nevertheless, there are indeed times when things blow up. It’s frustrating, but it does happen. And at that point, the only thing that will save your bacon is having a current backup.
Spend your time making sure you have good backups, not listening to the nattering of witch doctors on the Internet, and you’ll have a much better time with your computer.