git.md

@@ -12,8 +12,24 @@ xcode-select: note: no developer tools were found at '/Applications/Xcode.app',
 requesting install. Choose an option in the dialog to download the command line 
 developer tools.
 ```
+
 Agree and proceed with the installation.
 
+You can change the editor used by default by git by setting the `EDITOR` environment variable. You can edit your `~/.zshrc` with
+
+```
+open -t ~/.zshrc
+```
+Then, add a line similar to the following line at the end of the file (`nano` is a good choice because it is a terminal editor with no graphical user interface and it is easy to use):
+```
+EDITOR=nano
+```
+Finally, save the file after modification. If saving the file fails, it could be due to the fact that `~/.zshrc` is owned by `root`. You can acquire the ownership of the file with the following command:
+```
+sudo chown $(whoami):$(id -gn) ~/.zshrc
+```
+(... type your passwd since administrator privileges are required).
+
 ### 🐧 Linux
 
 On the [CECI clusters](http://www.ceci-hpc.be/), a recent version of git is available as soon as your are connected to the master node.