Sólo tiene que instalar "la Integración de Shell" y se instala automáticamente para usted.
En el iTerm2 Menú, simplemente haga clic en "Instalar Integración de Shell"
A continuación, debería ver la salida que indica que imgcat está instalado:
$curl -L https://iterm2.com/misc/install_shell_integration_and_utilities.sh | bash
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 2694 100 2694 0 0 2890 0 --:--:-- --:--:-- --:--:-- 2890
Downloading script from https://iterm2.com/misc/bash_startup.in and saving it to /Users/allan/.iterm2_shell_integration.bash...
Checking if /Users/allan/.bash_profile contains iterm2_shell_integration...
Downloading imgcat...
Downloading it2dl...
Adding aliases...
Done.
--------------------------------------------------------------------------------
The next time you log in, shell integration will be enabled.
You will also have these commands:
imgcat filename
Displays the image inline.
it2dl filename
Downloads the specified file, saving it in your Downloads folder.