Git Credential Manager | Generated by AI
You’re using Git Credential Manager (GCM) version 2.6.1 on macOS, and you’ve encountered an issue where git config --global credential.helper manager-core throws an error:
warning: credential.helper has multiple values
error: cannot overwrite multiple values with a single value
This happens because multiple credential helpers are already set in your Git configuration. You need to clear the existing values before setting a new one.
🛠 Fix the Issue: Reset Credential Helper
Step 1: Check Current Credential Helpers
Run:
git config --global --get-all credential.helper
This will list all configured credential helpers.
Step 2: Unset Previous Credential Helpers
Reset all credential helpers using:
git config --global --unset-all credential.helper
Step 3: Set GCM as the Only Credential Helper
Now, set Git Credential Manager (GCM) as the helper again:
git config --global credential.helper manager-core
Step 4: Verify the Change
Check if it’s correctly set:
git config --global --get credential.helper
Expected output:
manager-core
🛠 Alternative: Use --replace-all
If you want to overwrite existing values instead of unsetting them first, use:
git config --global --replace-all credential.helper manager-core
🧩 Extra Debugging
If you’re still having issues, you can check your full Git global config:
git config --global --list
If the issue persists, let me know! 🚀
Git Credential Manager (GCM) is a secure Git credential helper that stores and manages authentication credentials for HTTPS Git repositories. It works with services like GitHub, GitLab, Bitbucket, and Azure DevOps.
1. Install Git Credential Manager
GCM is included with Git for Windows and the official Git distributions for macOS and Linux. If it’s not installed, download it from:
🔗 Git Credential Manager on GitHub
Check if GCM is installed
Run:
git credential-manager version
If it’s installed, you’ll see a version number. If not, install it manually.
2. Configure Git to Use GCM
Run the following command:
git config --global credential.helper manager
For macOS/Linux, use:
git config --global credential.helper manager-core
To check the current credential helper:
git config --global credential.helper
3. Authenticate with a Git Server
Once configured, the first time you interact with a remote repository over HTTPS (e.g., git clone, git pull), GCM will prompt you for credentials.
- If using GitHub, GitLab, or Bitbucket, GCM will open a browser for OAuth authentication.
- If using a personal access token (PAT), enter it instead of a password.
4. Store and Manage Credentials
GCM securely stores credentials in the OS’s credential store:
- Windows: Windows Credential Manager
- macOS: macOS Keychain
- Linux: GPG-encrypted file (
~/.git-credentialsor~/.gitconfig)
To manually add a credential:
git credential approve
To remove a stored credential:
git credential reject https://github.com
To clear all credentials:
git credential reject
5. Using Git Credential Manager with Different Git Providers
GitHub
Use a Personal Access Token (PAT) instead of a password:
git credential reject https://github.com
git pull
You’ll be prompted to log in and enter your token.
GitLab
For GitLab, use OAuth or a PAT:
git credential reject https://gitlab.com
git pull
Azure DevOps
Use a PAT or Azure authentication.
6. Debugging Issues
If credentials are not saved or retrieved correctly:
- Check the credential helper:
git config --global credential.helper - Reset Git Credential Manager:
git credential reject https://your-git-service.com - Reinstall GCM if needed.
Would you like help configuring it for a specific service? 🚀