Install fonts
Apple plans to give OS X a complete makeover with the launch of Yosemite later this fall. As a preview of things to come, we've created a side by side comparison of Yosemite's new icons with those currently in use in OS X Mavericks. Oct 29, 2018 Double-click the font in the Finder, then click Install Font in the font preview window that opens. After your Mac validates the font and opens the Font Book app, the font is installed and available for use. Anyone else think that the sharp square corners in Windows 10 looks better than the rounded edges in Mac OS? Whenever I boot into Windows on my Mac, I can't help but feel like Mac OS would look nicer if it ditched all the rounded edges and went for a cleaner, sleeker look with sharp square corners on the edges of windows, like Win.
Double-click the font in the Finder, then click Install Font in the font preview window that opens. After your Mac validates the font and opens the Font Book app, the font is installed and available for use.
You can use Font Book preferences to set the default install location, which determines whether the fonts you add are available to other user accounts on your Mac.
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Fonts that appear dimmed in Font Book are either disabled ('Off'), or are additional fonts available for download from Apple. To download the font, select it and choose Edit > Download.
Disable fonts
You can disable any font that isn't required by your Mac. Select the font in Font Book, then choose Edit > Disable. The font remains installed, but no longer appears in the font menus of your apps. Fonts that are disabled show ”Off” next to the font name in Font Book.
Remove fonts
You can remove any font that isn't required by your Mac. Select the font in Font Book, then choose File > Remove. Font Book moves the font to the Trash.
Learn more
macOS supports TrueType (.ttf), Variable TrueType (.ttf), TrueType Collection (.ttc), OpenType (.otf), and OpenType Collection (.ttc) fonts. macOS Mojave adds support for OpenType-SVG fonts.
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Legacy suitcase TrueType fonts and PostScript Type 1 LWFN fonts might work but aren't recommended.