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Learn how to resolve the 'Password Authentication Failed' error for Postgres on macOS Monterey. Detailed steps to troubleshoot and fix port 5432 authentication issues.
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How to Fix 'Password Authentication Failed' for Postgres on macOS Monterey?

If you are encountering the "port 5432 failed: FATAL: password authentication failed for user 'postgres'" error on macOS Monterey, you are not alone. This issue typically arises when there is a mismatch in the credentials provided versus what is expected by the PostgreSQL server. Here, we will guide you through several steps to resolve this authentication error.

Steps To Resolve The Issue

Step 1: Verify PostgreSQL Service is Running
Ensure that your PostgreSQL service is up and running. Open your terminal and execute:

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If the PostgreSQL service is not running, start it using:

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Step 2: Access PostgreSQL Command Line Interface (CLI)
Access the PostgreSQL CLI to interact with the database and make necessary changes:

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Step 3: Reset the Password for User 'postgres'
Once you have the CLI open, you can reset the password for the 'postgres' user. Use the following SQL command to change the password:

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Be sure to replace 'newpassword' with a strong and secure password of your choice.

Step 4: Update pg_hba.conf File
Modify the pg_hba.conf file to ensure that the password authentication method is correctly set. The configuration file is usually located in the PostgreSQL data directory. To find out its location, you can typically use:

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Open the pg_hba.conf file and ensure the authentication method for local connections is set as follows:

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Save the changes and restart the PostgreSQL service to apply them:

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Step 5: Verify Connection Again
Finally, test the connection using the updated password:

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Enter the new password when prompted. If everything was done correctly, you should gain access without any authentication errors.

Conclusion
The "Password Authentication Failed" error for PostgreSQL on macOS Monterey can be resolved by checking the service status, resetting the password, and ensuring the pg_hba.conf file is configured correctly. By following these steps, you can restore proper authentication and uninterrupted database operations.

If issues persist, consider checking PostgreSQL logs for more detailed error messages and consult the PostgreSQL official documentation for further troubleshooting assistance.