How to install fonts on a Mac

The quick version is the one in our all-platforms install guide: unzip the download, double-click the font file, and click Install Font in the Font Book preview that opens. That covers most fonts on most Macs. This page is the longer version for everything around that click: where the font actually lands, how to install for every account on the machine, what to do when macOS says you already have this font, how to check a font that is behaving badly, and the handful of reasons a properly installed font refuses to appear inside the one app you need it in.

The install, step by step

1. Download the font and unzip it if it arrived as a .zip (double-clicking the zip in Finder is enough). You want the .ttf or .otf file itself.
2. Double-click the font file. Font Book, the font manager built into macOS, opens a preview showing the family name and its styles.

3. Click Install Font. On a current macOS the font installs into your personal font library and becomes available to your apps immediately.

Two other routes do the same job: drag font files straight onto the Font Book window (or its Dock icon), or open Font Book first and use File → Add Fonts. All three end in the same place, so use whichever matches how the files reached you.

For a pile of fonts at once, select all the files and drag them onto the Font Book window or its Dock icon. Font Book works through them one by one, validating each as it goes, which makes this the right route for fonts gathered from mixed sources. Copying the files straight into ~/Library/Fonts in Finder also works, but skips Font Book’s validation and duplicate checks entirely, so reserve it for fonts you already trust.

Not every file a download offers will install, either. The short version:

Where Mac fonts live, and why it matters

macOS keeps fonts in three libraries, and which one a font sits in decides who can use it:

• Your library (~/Library/Fonts): the default. Fonts here work only for your account.
• The Computer library (/Library/Fonts): fonts here work for every account on the Mac. Installing into it asks for an administrator password.
• The System library (/System/Library/Fonts): Apple’s own fonts. Leave it alone. Nothing you install belongs here, and macOS protects it for good reason.

To change the default destination, open Font Book’s Settings and set Default install location to Current User or All Users. If other people use this Mac and need the same fonts (a shared family or studio machine), All Users is the setting you want; otherwise Current User keeps your library yours.

Duplicate fonts: the warning that is safe to resolve

Install a font you already have and Font Book flags it as a duplicate, and the font list shows a dot next to copies that are turned off. Duplicates are not corruption. They usually mean the font exists in both your library and the Computer library, or an updated version landed next to its predecessor. Two active copies confuse apps about which file to use, so resolve them:

Select the font, then choose File → Resolve Duplicates. The automatic option keeps the copy macOS judges newest and turns the rest off; the manual option lets you pick per copy. If one copy is an old version you are replacing, removing it entirely (right-click the font, Remove) is cleaner than leaving it disabled. A disabled font is still installed, just hidden from apps, which is also a feature: disabling is the tidy way to shelve fonts you rarely use without deleting them.

Validating a font that misbehaves

Fonts are software, and a damaged or sloppily built file can make documents render oddly, slow an app down, or crash it on launch. Font Book can examine a font and report what it finds:

Select the font (or several) in Font Book and choose File → Validate Selection. A clean pass means the file’s structure is sound. Warnings about duplicates point back to the previous section; genuine errors mean re-download the font from its source rather than coaxing the broken copy. You can also validate before installing: in Font Book, choose File → Validate File and pick a file you have not yet added, which is worth doing with fonts from unfamiliar sources.

Installed, but missing inside an app

The font is in Font Book, enabled, and validated, and your app still does not list it. Work down this ladder; the first rung fixes it most of the time:

1. Restart the app. Most apps read the font list when they launch. A font installed mid-session simply is not in the list the app loaded. This is the single most common cause, and it is why “it does not show up” is so often a ten-second problem.
2. Look under the right name. Apps sort by family name, and some file their styles differently: a family whose styles install as separate entries (common with freeware) may appear as “Font Name Bold” as its own line rather than under “Font Name”. Search the app’s font menu rather than scrolling.
3. Check the font is On. In Font Book, a greyed name with an Off tag is disabled. Right-click and choose Enable.
4. Check for app-specific font systems. Adobe’s apps read the system libraries but also have their own font handling through Creative Cloud; a font activated through Adobe Fonts is a separate collection from your installed files, and the two do not mix in menus the way you might expect. Microsoft Office builds its own font cache; quitting Word completely (not just closing the window) and reopening forces a rebuild.
5. Confirm the file is really a font. A surprising share of “broken installs” are an unextracted .zip, an installer package that was never run, or a webfont format (.woff/.woff2) meant for websites, not desktops. Our font file types guide decodes every extension. For desktop use you want .ttf or .otf (and our OTF vs TTF explainer covers which).
6. Check the file is really on this Mac. With Optimize Mac Storage turned on, a downloaded font may only be an iCloud placeholder (a cloud icon in Finder), and Font Book cannot install a file that is not actually on disk. Control-click the file in Finder, choose Download Now, then install.
7. Check Gatekeeper did not block an installer. Bare .ttf and .otf files open in Font Book untouched. A font shipped as a .pkg installer package is software, though, and macOS may block an unsigned one, leaving nothing installed at all. When the foundry offers both, take the raw font files.

Removing fonts

Right-click any font in Font Book and choose Remove to delete it (it goes to the Trash, so a mistake is recoverable), or Disable to keep it installed but out of every app menu. Removing fonts you added yourself is always safe. The system fonts are protected and Font Book will not let you remove the ones macOS needs, which is the correct behavior, so there is nothing to be careful about beyond your own additions.

Questions, answered

Can I install fonts without Font Book? Yes: copy the files into ~/Library/Fonts in Finder. You give up Font Book’s validation and duplicate warnings, so it suits fonts you already trust.

A font is in Font Book but not in my app. Why? Usually the app started before the font arrived. Quit it completely and reopen it; apps read the font list at launch.

Are fonts from free download sites safe? A font file is data, not a program. The risk sits in installer packages and extras from unfamiliar sites, so prefer reputable sources and validate anything doubtful in Font Book first.

How do I install a font for everyone who uses this Mac? In Font Book’s Settings, set the Default install location to All Users, which installs into the Computer library. It asks for an administrator password.

That is the whole Mac picture: Font Book does the installing, three libraries hold the fonts, and a short ladder covers the rare font that misbehaves. The sibling guides cover Windows, iPhone and iPad, and Android, and the hub guide ties the platforms together.