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This repository has been archived by the owner on May 31, 2023. It is now read-only.

Modified version of the Fira Sans fonts to replace the default system font on macOS

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jenskutilek/FiraSystemFontReplacement

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Fira System Font Replacement

Note: I never updated this for macOS 10.13 and newer, and didn't even check if it is possible to replace the system fonts there. The repo has now been archived.

These fonts are intended as a system font replacement on Mac OS X 10.12 Sierra. If you are looking for a Fira Sans for Mac OS X 10.11 El Capitan, please use the old release 4.106.1.

The fonts are based on version 4.106 of the Fira Sans font family by Erik Spiekermann and Ralph du Carrois, and are licensed under the Open Font License version 1.1 or later. This package has been prepared by Jens Kutilek https://github.com/jenskutilek/FiraSystemFontReplacement.

How to install

Download and unzip the installer file from the Releases section. Right-click Fira System Fonts.pkg and choose "Open" from the context menu. In the alert about the package coming from an unidentified developer, click "Open" again. Follow the instructions in the installer and restart your computer when the installation process has finished.

It is recommended to shut down, turn off, and restart your computer to finish installation of the fonts. A simple reboot may lead to garbled dialogs, so a complete shutdown is highly recommended. This is necessary only once.

How to uninstall

Delete or move the font files called FSDisplay.ttf, FSText.ttf and FSTextItalic.ttf from the /Library/Fonts folder. Then shut down and restart your computer.

How does it work?

These Fira fonts have a special name table with names identical to those of the system fonts. Because the font folder /Library/Fonts takes precedence over the fonts which are in /System/Library/Fonts, these specially crafted fonts are used for the user interface instead of the original system fonts. The original system fonts are not deleted or modified in any way.

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Modified version of the Fira Sans fonts to replace the default system font on macOS

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