Just want to share the steps I did to upgrade, nothing out of ordinary, pretty straight forward.
Double-Click on Install Mac OS X, then few more clicks…
Accept the terms otherwise you can’t go on…
Oh well yeah, do it in the only HD I have 🙂
Finally use your account/password..
Installation will start, it took about 1hr, will restart at some point and continue the installation.
When done, you will get back to first window shown above with that amazing video you see when booting first time your mac.
Looking at the version now I’m on the Snow Leopard!
Something I realize is that the spotlight has to re-index, few more minutes and you are done.