SSL compatibility
Is macOS X El Capitan 10.11.6 compatible with SSL 3.0 or higher
iMac, OS X 10.11
In Terminal...
openssl version -a
- CFNetwork SSL
- Available for: Mac OS X v10.6.8 and later
- Impact: An attacker may be able to decrypt data protected by SSL
- Description: There are known attacks on the confidentiality of RC4. An attacker could force the use of RC4, even if the server preferred better ciphers, by blocking TLS 1.0 and higher connections until CFNetwork tried SSL 3.0, which only allows RC4. This issue was addressed by removing the fallback to SSL 3.0.
https://support.apple.com/en-us/HT205267
https://www.thesslstore.com/knowledgebase/ssl-install/mac-os-x-el-capitan-ssl-installation/
https://medium.com/@katopz/how-to-upgrade-openssl-8d005554401
