> On Aug 4, 2015, at 8:08 AM, Yulia Bensman <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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