How to Convert Mac DMG Font Files to TTF Converting Mac-specific font packages, often found in DMG (Disk Image) or DFONT formats, into standard TTF (TrueType Font) files is a common necessity for cross-platform workflows. While TTF was originally a joint venture between Apple and Microsoft to ensure cross-platform compatibility, many modern macOS fonts are still distributed in formats that Windows cannot natively read.
pip install fontbakery
fontbakery check-universal input.ttf
ls -l or file command to check.