It looks to me as though the openssl include directory is missing in /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/includeHowever, openssl is in MacOSX10.10.sdk.So either we are not supposed to compile against openssl anymore and should use SecureTransport now or they just forgot to include the header files.If we are supposed to use SecureTransport, is there any sample code? I've not found much and it would be handy to reference some when converting from openssl.Since the version of openssl shipping with El Capitan is 0.9.8zf, it's not much use anyway since it doesn't include TLS 1.2. So it's probably better to either use a modern external version of OpenSSL or switch to SecureTransport.