https://cdn.rawgit.com/mfd/7c7a915eb31474cc8c6a65066a4c4dc3/raw/f0f2fb94c21dea904812a53e0eb6cf0bc87f3754/GTWalsheimPro.css
<link rel="https://cdn.rawgit.com/mfd/7c7a915eb31474cc8c6a65066a4c4dc3/raw/f0f2fb94c21dea904812a53e0eb6cf0bc87f3754/GTWalsheimPro.css">
Fish is a smart and user-friendly command line (like bash or zsh). This is how you can instal Fish on MacOS and make your default shell.
Note that you need the https://brew.sh/ package manager.
You can also download the fish app from their website. I do recomand using brew because update are easier.