Apple Font Book
Font Book is a preinstalled utility in macOS developed by Apple and released in 2003. It is a font manager for the said operating system that allows you to browse and manage fonts that can be in .OTF and .TTF file formats.
Individuals can use the program to manage and install user or system fonts. User fonts are user-specific whereas system fonts can be applied across the whole computer. Moreover, the Font Book is a smart application which automatically removes any duplication in the font styles.
