Hi Jens,

Thank you for your answer. I saw this TN and  also made such conclusions. But I 
am still not sure, since first of all I am not sure if CFNetwork in Mac OS X 
and in iOS are progressing in parallel. So I wonder if somebody knows it for 
sure. Thanks again!

Yulia

On Aug 4, 2015, at 7:28 PM, Jens Alfke 
<j...@mooseyard.com<mailto:j...@mooseyard.com>> wrote:


On Aug 4, 2015, at 8:08 AM, Yulia Bensman 
<ybens...@interwise.com<mailto:ybens...@interwise.com>> wrote:

My question is: what is the maximal supported TLS version in CFNetwork library 
in various Mac OS X (starting from 10.7)?

According to TN2287, TLS 1.2 support was first added in iOS 5 (2011?), so it 
would have appeared in OS X in the next version released after that. You could 
look up the exact release dates, but I _think_ that implies OS X 10.8.

SecureTransport.h defines a constant kTLSProtocol12, but it doesn’t have an 
availability annotation showing what OS versions it’s applicable to.

—Jens




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