http://code.google.com/p/git-osx-installer上也提供了一个Git的图形化客户端：OpenInGitGui，可以从这里获得，OpenInGitGui十分小巧，下载解压后也只有16K，OpenInGitGui不用安装，双击即可使用，OpenInGitGui刚启动时，会记录打开过的资源库。
github使用SSH链接，需要设置SSH
1.检查SSH key
cd ~/.ssh
2.备份已有的key，（如果有的话）
mkdir key_backup
mv id_rsa* key_backup
3.生成SSH key
$ ssh-keygen -t rsa -C x.kristain@gmail.com
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/kristain/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in yes.
Your public key has been saved in id_rsa.pub.
The key fingerprint is:
9e:10:27:3c:7c:64:b9:12:b3:7f:a8:1a:8e:59:26:ea x.kristain@gmail.com
The key's randomart image is:
+--[ RSA 2048]----+
| |
| |
| |
| . |
| . S .. |
| . oE=o.. |
| . +o+.. |
| ..+.+.. |
| oOB=+o |
+-----------------+
4.将SSH key添加到GitHub
登录到GitHub页面，Account Settings->SSH Public Keys->Add another key
将生成的key(id_rsa.pub文件）内容copy到输入框中，save。
5.测试链接
$ ssh -T git@github.com
Hi kristain! You've successfully authenticated, but GitHub does not provide shell access.
出现上述提示信息说明连接成功（github并不提供shell登陆但已经连接成功）
三、设置个人信息
$ git config --global user.name "kristain"
$ git config --global user.email x.kristain@gmail.com