Xcode 3 recognizes my OS X application as an iOS app

I always use a future version of Xcode to write my software, occasionally checking back in Xcode 3 to see whether the application still compiles there. It usually does. However, today I found out that Xcode 3 detects the application as iOS and not OS X.

I checked the Base SDK, and it's fine. I checked the architectures, deployment target, etc.

To illustrate the issue, here's a screenshot

Again, my application is开发者_如何学运维 not an iOS application, but an OS X application.

What am I doing wrong?

PS: Yes, the Target is called "Mac".

Well, it turns out that it was a silly caching issue...

Apparently Xcode 3 builds a user profile within the project directory - of course, these files are hidden and I didn't even think about looking at them.

When the only thing I couldn't find in the project file was a solution, I noticed these two files sitting in the project directory. I closed the project, deleted the files, and opened the project again. Xcode 3 marked the project as an OS X application again!

Summary of the above: Delete the user profile and it will work again.