Microsoft keeps its own cache of your fonts, and sometimes this gets out of sync with your system. Restart all the things-and when you re-open PowerPoint you should see your font. To install a font in the 'Computer' group, open your Font Book (the default OSX app that manages fonts) and drag the files into the 'Computer' section in the left hand sidebar.
Install the font in 'Computer' not 'User.' When you double-click a font file in OSX, the operating system installs fonts in 'User' by default. Having trouble with custom fonts in PowerPoint in Office 2011? If you haven't already cracked your laptop into pieces out of frustration, here's the fix.
