How to Fix Git index.lock File Exists Error on Mac - Solving pip externally managed error on Ubuntu 23.04-Git Push Rejected: Non Fast-Forward Fix Guide

Updated 2026-07-28 17:32:23developer-tools
How to Fix Git index.lock File Exists Error on Mac - Solving pip externally managed error on Ubuntu 23.04-Git Push Rejected: Non Fast-Forward Fix Guide
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.