I\'ve recently updated to OSX Sierra (from El Capitan) and to Xcode 9. I removed all compatibility issues (like autolayout issues) and would like to commit to my local gitre
If you cant change the git name in Xcode, you can change username and email using the terminal:
xcrun git config --global user.name 'new_user_name' xcrun git config --global user.email 'new@email.com'
And restart Xcode.