If a font seems installed but is missing from an app on your Mac, first confirm that Font Book shows it as active, then check where it was installed, validate the file, and look for duplicates. Quit and reopen the affected app after checking those basics. If the font still appears in other apps but not this one, the app’s font support or font list may be the issue; Apple recommends contacting the app developer for third-party app problems. Apple’s Font Book guide
1. Confirm that the font is installed and active
Open Font Book and search for the family name. Check the font’s status and preview it. A font file copied to a folder or downloaded to your Mac is not necessarily installed for use: Apple’s documented installation path is through Font Book. You can install by opening the file in Finder and selecting Install, or by using Font Book’s File > Add Fonts to Current User. macOS supports common formats such as TrueType (.ttf) and OpenType (.otf); older formats may work but Apple does not recommend them. Apple: Install and validate fonts in Font Book
If Font Book lists the font but it is inactive, select it and use the activation control in Font Book. Exact labels and available controls can vary with macOS versions. If you installed through a font manager or another non-Apple utility, open Font Book > Settings and check whether “Show fonts managed by non-Apple utilities” is enabled; otherwise, the font may not be visible in Font Book’s list. Apple: Change Font Book settings
2. Check the installation location and account
Font Book can install a font for the current user or for all users of the Mac. A current-user font lives in your home Library’s Fonts folder and is available only to your account. An all-users font is in the system Library’s Fonts folder and is available to any user. If the font works in one Mac account but not another, this difference is a useful clue: install it for all users if that is appropriate and you have an administrator password, or install it separately for the account that needs it. Apple: Change Font Book settings
To inspect your home Library, use Finder’s Go menu while holding Option, then choose Library. You do not need to move font files manually as a first troubleshooting step; use Font Book’s installation controls so macOS can validate the font and check for duplicates. Apple: Install and validate fonts in Font Book
3. Validate the font and resolve duplicates
In Font Book, select the font and choose File > Validate Selection. You can also choose File > Validate File to check the original downloaded file. Expand the result to read any details: green means it passed, yellow indicates a warning, and red indicates failure. Remove a font only when the validation result shows it failed and you have confirmed it is the copy you intend to remove. Apple: Install and validate fonts in Font Book
Next, choose File > Resolve Duplicates. If several copies exist, review them before resolving; Font Book marks its recommended active copy. A duplicate can explain why a different version or style appears than expected, but resolving duplicates can deactivate or move inactive copies, so review the choices rather than changing every copy blindly. Apple: Install and validate fonts in Font Book
4. Refresh the app’s font list
Quit the affected app fully, then reopen it and check the font menu again. This is a practical first refresh step after installation; it does not guarantee every app will rescan fonts. If the font is absent from one app but appears and works in another, the evidence points toward an app-specific issue. Confirm the app supports the font format and the specific style you need, and consult that app’s help or developer support. Apple directs users to the developer when fonts do not appear in third-party apps. Apple: Troubleshoot Font Book problems
Check the exact family and style names in Font Book. A family may contain separate regular, bold, italic, or variable styles, and an app may expose them differently in its menu. If only one style is missing, report that specific style and the app version to the developer rather than reinstalling the whole font collection.
5. Escalate carefully if the problem remains
If the font is validated, active, and visible in more than one app, but consistently missing in a single app, gather the font family and style, macOS version, app name and version, and whether another app can use it. Ask the app developer about font support or app-specific refresh steps. Avoid terminal cache-reset commands or deleting system font files based on generic online advice: Apple’s current Font Book troubleshooting guidance does not prescribe those as standard fixes for a font missing from a third-party app. Apple: Troubleshoot Font Book problems
If fonts are missing from Font Book itself, that is a different problem from one font missing in one app. Apple points to restoring the fonts that came with the Mac when no fonts appear in Font Book; note that resetting fonts moves installed fonts to a separate folder, making them unavailable until reinstalled. Apple: Troubleshoot Font Book problems
Work through the checks in order: verify the active font in Font Book, confirm the correct user account and install location, validate the file, resolve any duplicate with care, and reopen the affected app. The point where the font disappears—Font Book, one account, or one particular app—helps narrow down who can provide the next useful fix.