macOS CLT Python (LibreSSL) can break TCP tunnel: SSLError('No cipher can be selected') when setting PSK ciphers

[khj1212k]

Environment

• macOS 26.3 (25D125)
• Apple Command Line Tools python3: 3.9.6 (LibreSSL 2.8.3)

Issue
Creating a TCP tunnel can fail on macOS when using the system/CLT python that is built against LibreSSL.

Observed error:

• SSLError: ('No cipher can be selected.',)
• Trace points to code that creates SSLPSKContext(...); ctx.set_ciphers("PSK")

Workaround

• Using an OpenSSL-based Python build (e.g. Homebrew python3.13) makes the TCP tunnel path work.

Request

• Could pymobiledevice3 detect LibreSSL at runtime and fail with a clearer, actionable message (e.g. "LibreSSL python is not supported for PSK/TCP tunnels; use an OpenSSL python build")?
• If there is a compatible cipher string for LibreSSL that should work, I can help test.

[doronz88]

Python 3.13+ is required to work with newer devices since PSK was only added later on

[doronz88]

I didn't encounter any unexpected error myself - but if you have feel free to submit a PR