Photoshop CC 2018 Fonts not available

I have fonts installed in my system - Mac OS 10.12.6 - that are available in all applications, including Photoshop Elements 12. But, they are not available in the Fonts menu of Photoshop CC 2018. I have reset PS preferences as advised in another post, but that did nothing. Can you please tell me why some fonts don't show up in CC 2018?