how i can build a application
???
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The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
???
Try Googling.
Press Cmd+R -- that's "Run", in XCode. It will build your application and then run it. Or, taking your question literally, to only build it, press Cmd+B.
If you don't have XCode, download it from the App Store -- it's free for Lion. From the App Store:
Xcode provides everything developers need to create great applications for Mac, iPhone, and iPad.
-- actually not everything, you have to supply a brain.
how i can build a application