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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.
I don't understand how app developers retain compatibly with versions of iOS as early as 2.0. There are still apps on the app store than require 2.0. Open only allows a minimum deployment target of 4.3 now. How do app developers do this?
The pull down list for Deployment Target has a minimum of 4.3 but you can type in a lower number.
If you mean for the store, current tools limit minimum support to 4.3.
Other iOSs make up such small %, that it doesn't pay to support them. Put your energies into current tools, releases, etc.
When you are doing a project in the XCode, in IOS application target, you find: deployment target, there you can select the version of IOS that you are interested in. The minimum is 4.3.
How do app developers keep compatibility with old versions of iOS?
