Question

I have seen few videos on youtube which are saying you don't need to have Leopard to upgrade to Snow Leopard and you can use the upgrade DVD to do a clean installation, I was wondering if its true? I considering to reinstall everything because its quite messy right now, and I think I should try Snow Leopard upgrade DVD instead first install Leopard and then upgrade it to Snow Leopard? Will it break things? Any suggestion/experience will be very helpful.

One of the examples of such videos are

http://www.youtube.com/watch?v=z0K-mD8rAyA

Answer 1

If your Mac originally came with Tiger, then I think a clean install might break the iLife things that came with your Mac. (You cannot easily install those on a clean installation of a newer OS X, I think, but I might be wrong. Installing iLife that came with 10.5 seems fine though, but your mileage may vary.)

Apart from that it's totally fine (and legal, if you own both Leopard and Snow Leopard for that Mac).

However, the "Erase and Install" option is no longer part of the normal installation, so you'll need to use Disk Utility (and backup your personal files). See as many as 44 steps at Apple's Mac OS X v10.6 Snow Leopard: How to Erase and Install.

As a side note: "Archive and Install" is no longer available at all. But apparently: if you need to reinstall 10.6, it automatically archives and installs for you (or, one can do it manually).