If you’ve ever downloaded a font package on a Mac, you’ve likely encountered a DMG file . While DMG (Apple Disk Image) is a convenient delivery format for macOS software and assets, it’s not a font format itself. To use those fonts on Windows, Linux, or even cross-platform design software, you’ll need to convert the actual font files inside—typically to TTF (TrueType Font) .

for file in *.otf; do fontforge -lang=ff -c 'Open($1); Generate($1:r + ".ttf")' "$file" done FontForge can also convert (Mac data‑fork font) and .ttc (TrueType Collection – it will extract each font individually). Method C – Using otf2ttf (Command Line, macOS/Linux) If you only need OTF → TTF, the tiny utility otf2ttf is fast and reliable.

For most users, offers the best balance of power, price (free), and privacy (offline). For a quick single font, an online converter like CloudConvert works fine.

Install via Homebrew (macOS):

Always remember: converting is technically easy, but legally and ethically, respect the font’s license. Now you can take those Mac‑packaged fonts and use them anywhere TTF is accepted.