Using JetBrains Mono Inside VSCode
JetBrains Mono can be downloaded from the JetBrains Site Here
The information below assumes that you have downloaded the font, unzipped it and added to the macOS Font Book.app
macOS settings.json file location
On macOS the settings.json file is located here:
$HOME/Library/Application Support/Code/User/settings.jsonContents of Settings File
Here is a snippet from my settings.json file, commented for reference.
{
"editor.fontFamily": "'JetBrains Mono', Consolas, monospace", // Set the font
"editor.fontLigatures": true // Turn on font ligatures
}