> On Oct 7, 2016, at 2:25 PM, a...@hiddenreflex.com wrote:
> 
> For some mysterious reason our SPDY encrypted proxy fails in our chromium
> based browser only in Mac OS X Sierra.  It works fine in every other
> operating system. We're getting a "CERTIFICATE_INVALID_ERROR" even though
> our certificates are of course fine.

Are you aware of App Transport Security? It’s a security feature that enforces 
minimum standards for SSL/TLS connections. Among other things, it requires a 
minimum of SHA256 for digests in X.509 certs. That my be your problem.

—Jens


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