How to Fix: Error while trying to start PostgreSQL installed via Homebrew: "Operation not permitted"

The 'Operation not permitted' error occurs when the launchd process is unable to execute the plist file due to a lack of permissions. This affects users who install PostgreSQL via Homebrew and attempt to start it using launchctl.

This issue can be frustrating as it prevents the user from accessing their PostgreSQL installation, which may have critical applications relying on it. The following steps will guide you through resolving this problem.

⚠️ Common Causes

• The first main reason for this error is that the launchd process requires elevated permissions to execute plist files. This is a security feature implemented by Apple to prevent malicious scripts from running without user intervention.
• An alternative reason may be that the plist file is not properly formatted or contains syntax errors, which can also result in the 'Operation not permitted' error.

🚀 How to Resolve This Issue

💡 Conclusion

To summarize, the 'Operation not permitted' error when starting PostgreSQL via Homebrew can usually be resolved by elevating permissions using sudo or correcting plist file syntax errors. If neither method works, further troubleshooting may be necessary to identify and fix the underlying issue.