Anthony Giretti 1/12/2026

.NET 10: Automatic support of TLS 1.3 on MacOS

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This technical article explains how .NET 10 introduces automatic support for TLS 1.3 on macOS for outbound HTTPS connections. It details the benefits of TLS 1.3, such as faster handshakes and stronger security, and demonstrates that developers get this upgrade without modifying their HttpClient code. The post also covers how to verify the negotiated TLS version and notes important caveats regarding OS and server support.

.NET 10: Automatic support of TLS 1.3 on MacOS

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