git gui not working after installing in Mac (e.g. Mountain Lion)

When I ran git gui, I got this:

$ git gui
git: 'gui' is not a git command. See 'git --help'.

Did you mean one of these?
	grep
	init
	pull
	push

But I ran other git commands fine, including gitk. How can I fix this?

Thanks.

Edit your git config to an add an entry for gui in the alias section

nano ~/.gitconfig

> [alias] > > gui = !sh -c '/usr/local/git/libexec/git-core/git-gui'

Edit 2020

It looks like the path in the original answer is now obsolete. Updated instructions: > [alias] > > gui = !sh -c '/usr/local/opt/git/bin/git gui'

This post: http://www.cmsimike.com/blog/2012/07/30/git-gui-and-osx-mountain-lion/ saves me.

Edit ~/.bash_profile and put in

alias gui='/usr/local/git/libexec/git-core/git-gui'

Now the new command is gui instead of git gui.

EDIT (28 Jan 2013)

I have found a better answer to why git gui wasn't working: https://stackoverflow.com/questions/12667936/did-apple-remove-the-git-gui-command-in-xcode-4-5-command-line-tools. Please refer to this solution instead.

Apple did indeed remove the 'git gui' command. I decided to just homebrew git instead of relying on the XCode command line tools.

brew install git

Then I edited the /etc/paths file to have the /usr/local/bin directory come before the /usr/bin directory, because that wasn't right either. Then exited the terminal window and restarted, and now I get:

$ which git
/usr/local/bin/git

$ git --version
git version 1.7.12.1

and the git gui command works again.

EDIT (2020-02-03)

As of version 2.25.0_1, git gui is now provided by a separate formula in brew, named git-gui. See the following PR and issues for the background to this change: https://github.com/Homebrew/homebrew-core/pull/49136

So along with installing Homebrew's git, to have access to git gui one must run

brew install git-gui

Seems like in mid-2021 all answers got obsolete (even mine!), so here's my new answer:

brew install git-gui || brew upgrade git-gui
git gui || /usr/local/opt/git/bin/git gui

OLD ANSWER: Seems like in late 2017 all answers above got obsolete, so here's my new answer:

brew install git || brew upgrade git
git gui || /usr/local/opt/git/bin/git gui

2020

brew install git
brew install git-gui
git config --global --add alias.gui '!sh -c '/usr/local/opt/git/libexec/git-core/git-gui''

Now, enjoy:

git gui

You might need to install/upgrade separately the git-gui package after installing Mountain Lion.
As mentioned in "Git GUI client for Linux", git gui has its own package (beside git-core).

From the comments, it seems a git-gui package isn't yet available for Mountain Lion.
However, this post report making work an alternative gui like Source Tree.
That could be a good workaround.

I have the same issue. Git-gui appears still installed for me (/usr/local/git/libexec/git-core/git-gui is my location) but it doesn't just work without specifying the full path. This indicates a path issue, but I've not looked into it much further.

edit Try adding /usr/local/git/libexec/git-core to the beginning of your PATH variable. Looks like all the git binaries are there so that should work.

Adding to the path worked for me.

I just added this line to my ~/.profile and git gui is alive once again. &(%ing mountain lion. export PATH=PATH:/usr/local/git/libexec/git-core

In addition to Victor's answer above, you need to an additional step, because brew install git didn't create simlink for git-gui.

Inside /usr/local/bin, run the following:

ln -s ../Cellar/git/1.8.3.2/libexec/git-core/git-gui git-gui

(Replace git version with your own)

While I am not sure how to open git gui from the terminal in Mountain Lion it is possible to use it using OpenInGitGUI which opens git gui from Finder. The download and instructions are available here.

This may not be quite as convenient as typing 'git gui' in the terminal but it is pretty close. Basically all you need to do is type 'open .' to open the current directory in Finder and then click the Git button to open up git gui.