You don’t need a separate version, you can check for available features at runtime: https://developer.apple.com/library/mac/#documentation/developertools/conce

You don’t need a separate version, you can check for available features at runtime: https://developer.apple.com/library/mac/#documentation/developertools/conceptual/cross_development/Configuring/configuring.html https://developer.apple.com/library/mac/#documentation/devel... http://www.cocoawithlove.com/2009/09/building-for-earlier-os-versions-in.html http://www.cocoawithlove.com/2009/09/building-for-earlier-os...