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 gitrep now.
the following error appears:
I thought it might be the same bug appeared in XCode 7 mentioned here: Xcode and Git Source Control : “The working copy XXXXX failed to commit files”
But it wasn't. I tried the solution mentioned above. Username and EMail are properly set. I did save everything, tried restarting the machine and a few other minor things. Nothing worked - i can't commit.
Any help appreciated.
EDIT
I got it to work by commiting manually and adding changes before with
git commit -a -m "Fixes"
I will keep an eye on that if it happens again once i made more changes and report here if so.
The solution is to add changes once with a git command. Use terminal and navigate to Xcode project folder. If you are in the right folder, this command:
ls -al
will list a .git folder. Then you know you're at the right place. Then execute
git commit -a -m "Commit title here"
After that commit via Xcode should work again.
For me I had to populate Full Name and Email address in Preferences > Source Control > GIT (tab). They were blank.
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.
For me, the Preferences> Source Control > Git > Ignored Files had the Watchkit Extension Complications Controller. Removing it from Ignored Files fixed the problem. Xcode 10.1, Watch OS 4.2.
the problem that I had was whenever I tried to create source control it show Couldn’t communicate with a helper application. so in Xcode preferences I go to accounts and there I see I was logged out I signed in again and save the project, after closing the project and force quitting Xcode I opened it again and now it works fine for me
来源：https://stackoverflow.com/questions/46607843/xcode-9-commit-couldnt-communicate-with-helper-application