Installing on macOS: 1. Open the "Inter UI (OTF)" folder 2. Select all font files 3. Right-click (or ctrl-click) the selected files and choose "Open with..." → "Font Book" 4. Press the "Install" button If you get any errors, like Font Book saying there're duplicate fonts, cancel the installation and instead try the instructions below: Installing on macOS, manually: 1. Copy the "Inter UI (OTF)" folder 2. Press cmd-shift-G in Finder 3. Enter "~/Library/Fonts" into the dialog that shows up and press RETURN. 4. Paste the "Inter UI (OTF)" folder. If you have a previous installation of Inter UI, you should make sure to remove those fonts files before installing new ones. See https://github.com/rsms/inter for more information