Hi, My app uses NSURLConnection to post an xml file to a financial organization in my country that will at some point next year stop using SSL protocols and switch to TLS 1.1 or 1.2. My app is linked to 10.6 SDK as many of my clients use older systems. There are several questions I like to ask and I am not sure how this all affects me. Does it matter to what SDK am I linked? If my app is used on latest Mac OS will NSURLConnection use latest TLS by default? How do I test the TLS version on a system? Should I link to the newer SDK? Or just tell affected clients to upgrade to Mountain Lion or newer? The problem is I can't test anything now as the organization in question just announced that at some point in 2016. they'll stop support for anything less than TLS 1.1.