我使用以下方法在mac上升级git。

hansi$ brew install git 

hansi$ git --version 
git version 2.19.0


hansi$ brew install git
Warning: git 2.25.1 is already installed, it's just not linked
You can use `brew link git` to link this version.

hansi$ brew link git 
Linking /usr/local/Cellar/git/2.25.1... 
Error: Could not symlink bin/git
Target /usr/local/bin/git
already exists. You may want to remove it:
  rm '/usr/local/bin/git'

To force the link and overwrite all conflicting files:
  brew link --overwrite git

To list all files that would be deleted:
  brew link --overwrite --dry-run git

hansi$ brew link --overwrite git 
Linking /usr/local/Cellar/git/2.25.1... 205 symlinks created


hansi$ git --version
git version 2.25.1

对我来说，在Homebrew 1.6.7中，以下操作是有效的:

brew upgrade git

我使用以下方法在mac上升级git。

hansi$ brew install git 

hansi$ git --version 
git version 2.19.0


hansi$ brew install git
Warning: git 2.25.1 is already installed, it's just not linked
You can use `brew link git` to link this version.

hansi$ brew link git 
Linking /usr/local/Cellar/git/2.25.1... 
Error: Could not symlink bin/git
Target /usr/local/bin/git
already exists. You may want to remove it:
  rm '/usr/local/bin/git'

To force the link and overwrite all conflicting files:
  brew link --overwrite git

To list all files that would be deleted:
  brew link --overwrite --dry-run git

hansi$ brew link --overwrite git 
Linking /usr/local/Cellar/git/2.25.1... 205 symlinks created


hansi$ git --version
git version 2.25.1

不需要任何命令就可以做到这一点。 Katrina提到的Git安装程序是解决方案，但是这样做更容易:

进入链接- https://sourceforge.net/projects/git-osx-installer/ 在“项目活动”下选择最新版本，下载并打开扩展名为.pkg的文件。 然后，在安全与隐私系统首选项中，选择“无论如何打开”选项。安装后，您将获得最新版本的git

在谷歌上搜索“在mac上升级git遇到麻烦”后，我阅读了几篇文章，并尝试了以下步骤，然后通过完成步骤4解决了问题:

I updated my terminal path by using the above mention export command. Every time I quit the terminal and restarted it, when I typed git --version the terminal, it still return the older version 1.8. I followed the README.txt instructions for upgrading to the current version 2.0.1 that comes with the .dmg installer and when I restarted the terminal, still no go. I looked for /etc/path/ folder as instructed above and the directory called "path" does not exist on my Mac. I am running OS X Mavericks version 10.9.4. Then I recalled I have Homebrew installed on my Mac and ran the following: brew --version brew update brew search git brew install git

这终于解决了我的问题。如果有人有一些见解，为什么这工作，进一步的见解将大大赞赏。我的系统上可能还有一些去年使用Ruby时遗留下来的路径设置。

为了保持两个版本，我只是改变了PATH环境变量的值，把新版本的git路径“/usr/local/git/bin/”放在开头，它强制使用最新版本:

$ echo $PATH 工作:/ bin: / usr / sbin: / sbin: / usr /地方/ bin: / opt / X11 / bin: / usr /地方/ git / bin / $ git——版本 git 2.4.9版本(Apple git -60)

原值:/usr/ bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/usr/local/git/bin/

新值:/usr/local/ git/bin/:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin

$ export PATH=/usr/local/git/bin/:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin $ git——版本 Git 2.13.0版本