mac 10.11 下的sourceTree 和 git 总是需

参考：https://stackoverflow.com/questions/11745504/remove-credential-osxkeychain

curl http://github-media-downloads.s3.amazonaws.com/osx/git-credential-osxkeychain -o git-credential-osxkeychain

mv git-credential-osxkeychain /usr/local/bin

chmod u+x /usr/local/bin/git-credential-osxkeychain

git config –global credential.helper osxkeychain