Upgrading Mac OS 10.4.11 to 10.5 for iPhone Dev SDK

[rootX]

I was thinking if I have to buy new cd for getting 10.5 version or I can update to 10.5 from 10.4.11?
Eventually, I am installing iPhone dev SDK and was thinking if I need 10.5 for that ...

Thanks.

 

[jtbell]

You have to buy 10.5 if you're at the 10.4.x level or below. When only the third component of the version changes, it's a "minor" update that you can download for free.

Suggestion: If you have an Intel Mac, don't buy 10.5 now unless you really need to upgrade in a hurry. There are rumors that 10.6 ("Snow Leopard") will be announced at MacWorld next week and will be available in the next couple of months. It's being designed to be significantly more efficient on Intel Macs.