How do I resolve a GitHub message that says the tip of my current branch is behind its remote counterpart?
问题 I am trying to learn how to use GitHub to version-control my work as I go. (I work alone, no collaborators, no different branches, just me backing up my work as I go.) I have set up private Git repositories at BitBucket.org. I am using GitHub for OSX as my Git GUI. But when I make edits to the files in my local Git repository on my hard drive, then use GitHub for OSX to try to "Commit & Sync," I get this error: git: 'credential-osxkeychain' is not a git command. See 'git --help'. git: