i just installed unity for iphone 1.7 and the latest de xcode with iphone 4.0 sdk from apple website.
i understand the message but i don't know hot to solve the problem since i cant find anything about iOS skd 3 on apple website
please help!
Yeah, you can't use that SDK anymore. Set your Unity to use 'Unknown' SDK, and when you build, in xcode, open up the properties to your project, and in the build tab you can set the SDK to use.
I Typically build with SDK 4 (since you no longer have an option) and target OS 3.1.2. The Target OS is listed further down in that huge list :)