Don't upgrade to OS X 10.8 Mountain Lion before reading this
L33tdawg: On a hackintosh and looking to upgrade? We've got a guide for you.
Apple released OS X 10.8 "Mountain Lion" ($19.99, Mac App Store) today and we Mac users tend to be quicker than most to update our software. This blog post is a cautionary tale that you should heed if you use your Mac to earn a living or if your rely on it to be productive.
First, it's important to note that 10.8 is a major update of the entire operating system. It's much different than an incremental update to an application or even an incremental update to the OS (like 10.7.4 was). If you use your Mac to make a living or perform live, you should wait until the dust settles before installing an update of the magnitude of Mountain Lion.
You've gone this far without it, so another couple of days or a week won't kill you. Or as the old expression goes "pioneers take the arrows, settlers take the land." The problem with major OS updates like 10.8 is that they break things. And nothing's worse than installing a major update like 10.8 only to find out that one of the apps that you use daily now crashes on launch, or won't connect to the Internet. Or that your data is gone or corrupted.