App Transport Security

Apple has deprecated insecure HTTP in macOS 10.11 (El Capitan). Applications compiled with 10.11 SDK are by default blocked from using HTTP and will not be able to download any updates over HTTP. You must either:

If you don’t do this, your app will not be able to download updates on macOS El Capitan, and your users will be stuck with an old version forever.

App Transport Security has other specific requirements too, so please test updating your app on 10.11 even if you already are serving over HTTPS!

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