Congratulations: You do not need to read any further, you are done! Testing in Non-Adobe AppsBut let us assume you decided to test your font in an application like TextEdit or Word. If you want to test your font in a real-life situation, and you are thinking about Adobe apps, well, then you can use the Adobe Fonts folder, and avoid cache problems from the start. All of those fonts can be loaded in Sparkle’s custom web font pane, and used as web fonts. Perhaps you found a font on fontsquirrel.com and installed it locally on your Mac. Apple's new system font is not publicly exposed. Apple has started abstracting system font names:The motivation for this abstraction is so the operating system can make better choices on which face to use at a given weight.Changes you made in the font do not appear on the screen The font menu does not show your font anymore Likewise, font caches allow your Mac to speed up the use of installed fonts because all the stuff your Mac had to calculate to make your font appear on the screen, has already been done.But, of course, if the original font has changed, and the font cache does not know about it, then the data stored in it is outdated and most likely wrong. They can speed up your computer because it does not have to reprocess the original information every time. Caches are collections of previously calculated data.
![]() Important: Don’t just deactivate it, REMOVE IT. Cleaning CachesIf this happens to you, delete the font from Font Book or whatever third-party utility you use. Your font does not print, or prints wrong or garbled lettersOr any other font weirdness, really. You type one letter, but a different one appears So, the second restart (without Shift) boots your Mac normally again.Your Mac may be a little busy for a while, so you may see more HD and CPU action for a few minutes. But because it is starting in Safe Mode, some kernel extensions are not loaded, and your Mac may not appear as performant and snappy as usual. Once your login screen comes up, log in to your user, and restart again, this time without the Shift key.Important: restarting twice is essential, because the first restart (with Shift) deletes the root of all evil, the font cache. Starting with Shift should cause your Mac to delete and rebuild its caches, amongst which the font cache. What Is The System Font High Sierra? Code Line WillAttention, you will not see ‘passphrase bullets’ ( The first code line will prompt you for your password. If you type them, each line must be finished by pressing the Return key if you paste them, you may need to press Return to confirm the entry of the third line. Make Apple Type Server clean its databaseShould this not help, or if you simply want to avoid restarting twice, open up your Terminal.app (you can find it in /Applications/Utilities/) and type (or copy and paste) the following commands. Don’t think you can get away without a restart, otherwise the trouble will reappear. No, really, open the Apple menu in the top left corner and choose Restart. Type it anyway and confirm by pressing the Return key: sudo atsutil databases -removeAnd now, restart your Mac. Follow the link for a more precise description and installation instructions.Attention: we were able to confirm the reliability of this workaround only for macOS 10.13 and later. Nico was so nice to write a Python script called Export and Install that does exactly that. So if you make sure that the OTF you export has a different file name every time you export, and you delete all previous versions, you should be fine. In Finder, Choose Go > Utilities (Cmd-Shift-U) and double click the app called Script Editor:Workaround: Export with Changing File NamesNico Hagenburger found out that the macOS font cache depends on the file name of the font file. Thus, you do not need to remember the Terminal voodoo or go looking for this blogpost again.OK, let’s do this. Cleaning Caches with an AppleScriptSince you are on a Mac, you can put these exact commands in an AppleScript, and make it conveniently available in the Script menu. Excel macros for macOccasionally, you would still need to restart apps that used the font.If you want to know more, Nico wrote a Medium article about it: Install Fonts Without Caching Issues on MacOS.Update : Clarified where to delete the font.Update : Removed the superfluous user-specific cache-cleaning, the sudo line removes all caches.Update : Added link to Adobe Fonts Folder tutorial.Update : Updated screenshots for Glyphs 2.Update : Partial rewrite for better clarity, new screenshots, added TextPreview.Update : Added ‘Workaround: Export with Changing File Names’. Sometimes it worked, sometimes it did not.
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