Imagine if you picked out a new printer, checked the system requirements on the box to be sure it would work with your computer system, took it home, set it up, were happily using it until one day when, without warning, your new printer was disabled by a non-optional, irreversible driver update.
OpenType fonts are amazing, but you can’t get to all the awesomeness without Adobe Illustrator or InDesign, right? Wrong! Where there’s a will, there’s a way to get your hands on a bunch of OpenType features and every single glyph using just the software that comes with your Mac.
Compared to the PC side, there is a dearth of font viewing software for Macs. In particular, none of the freebies and few of the for-pay font utilities I have found allow you to view uninstalled fonts.