Installing font files on macOS Using Font Book: 1. Open the "Font Book" application. 2. In the main menu, select File, then Add Fonts... 3. Find the "Inter Desktop" folder, select the folder (or open the folder and select all the files inside the folder) and press the Open button. Using Finder: 1. Copy the "Inter Desktop" folder 2. Press cmd-shift-G in Finder and go to: ~/Library/Fonts 3. Delete any existing "Inter" files and folders 4. Paste the "Inter Desktop" folder