# 1. Installation of MacOS software

The instructions below assume that you are using a Mac with "Homebrew" installed. Homebrew is a package manager for MacOS that makes it easy to install software. If you're familiar with Linux "apt-get" or "yum" commands, the "brew" command works similarly. For more information on installing Homebrew, visit their website at <https://brew.sh/>. To quickly install Homebrew, follow these steps as a non-root user in a terminal window.

`$ /bin/bash -c "$(curl -fsSL` [`https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh`](https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)`)"`

Once Homebrew is installed,  you’ll need to install two packages.  To do that,  in the terminal windows,  type:

$ `brew install yubico-piv-tool yubico-yubikey-manager`