Mac OS SVN Error: E120171: SSL Communication Error - How to Fix

This error message indicates that there was an SSL communication error during the execution of the SVN command on a Mac OS system.

To resolve this issue, you can try the following steps:

1. Update SVN: Make sure you have the latest version of SVN installed on your Mac OS. You can download and install it from the official SVN website or use a package manager like Homebrew to update it.

2. Check SSL Certificate: Verify if the SSL certificate used by the SVN server is valid and trusted. If it's self-signed or expired, you may need to update or renew it.

3. Verify Connectivity: Check if your Mac OS system has a stable internet connection and can reach the SVN server. Sometimes network issues can cause SSL communication errors.

4. Disable SSL Verification: As a temporary workaround, you can try disabling SSL verification for the SVN command. Use the --trust-server-cert or --non-interactive option to bypass SSL verification. However, keep in mind that this is not recommended for production environments as it compromises security.

5. Check Firewall and Proxy Settings: Ensure that your Mac OS firewall or any proxy settings are not blocking the SVN communication. Adjust the settings accordingly to allow SVN communication.

If the above steps do not resolve the issue, you may need to consult with your SVN server administrator or check the SVN server logs for more specific error details.