Very interesting, I only started getting errors locally yesterday when uploading to Testflight. Previously I would have to upload then wait and call a support Agent for the error. Yesterday I got the very same error as you. Invalid CFBundleSupportedPlatforms value. The CFBundleSupportedPlatforms key in the Info.plist contains an invalid value, [iPhoneSimulator] I removed the library temporarily and voila the build processes.