Hi,
my Project is building only for iPhone OS 2.0 . How can i change that the project should build for 2.1.1? If i change it in the project settings it will swap to 2.0 again.
You need to alter the trampoline.
The project is overwritten again by the trampoline everytime you click build.
you find it in the unity iphone app package
thanks for the reply but what is a trampoline? What exactly i have to do?
Like dreamora said, it’s in the Unity iPhone package. Here is how:
Right click on the Unity app and “show package contents” then go to Contents/Frameworks/iPhone-Trampoline and you will see the original XCode project there. Just remember your changes.
The trampoline is the unity iphone project that is placed in your apps folder on every build and overwrites whatever you had there.
So its the template from which your iphone games XCode project is inherited.
in the trampoline you can change the default iphone SDK and base SDK used as well as configure your development provision permanentely
Thinking about it I also might better add bliprobs enhancement pack directly there and only use the postprocess script to copy in the right icons and screens
thank you 
! now it works with 2.2.1 !