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Editorial Team
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Editorial Team
Asked: May 16, 20262026-05-16T16:48:43+00:00 2026-05-16T16:48:43+00:00

Just upgraded my xcode to the latest SDK which has the iOS 4.1 SDK.

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Just upgraded my xcode to the latest SDK which has the iOS 4.1 SDK. My app was built for 4.0, but xcode is no longer letting me build for 4.0 (The SDK is missing). I’d prefer not to require 4.1 yet as the app doesn’t need it and it just came out yesterday. Any ideas to allow me to build for 4.0? I don’t see an option to download the last version of xcode from the developer website.

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  1. Editorial Team
    Editorial Team
    2026-05-16T16:48:44+00:00Added an answer on May 16, 2026 at 4:48 pm

    It is a common misunderstanding that because it is called Base SDK it should refer to the minimum requirement of your app. It is not so! The Base SDK is the highest SDK you will develop against and it makes sense to keep it updated to the latest features and iOS version (all you do is just not use any of the new functionality if you don’t want to). If you plan to support older versions of iOS instead, what you have to do is set the Deployment Target to the minimum SDK level you want to support.

    It has taken me a while and a fair amount of reading to work this out. This is the basic idea. If you need more info, a more complete explanation of this is available in one of my posts.

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