Import font into R using extrafont package

Question

I'm trying to import Garamond into R using the extrafont package. I am able to successfully import other fonts when using the unspecified font_import() function directed towards the font location folder, but I'm missing out several fonts located in that folder. Any suggestion why only some fonts are imported and others not?

I've tried the

font_import(pattern = "Garamond.ttf")
ttf_import(pattern = "Garamond.ttf")

with the following error message:

Scanning ttf files in /Library/Fonts/, /System/Library/Fonts, ~/Library/Fonts/ ... Extracting .afm files from .ttf files... Error in data.frame(fontfile = ttfiles, FontName = "", stringsAsFactors = FALSE) : arguments imply differing number of rows: 0, 1

Answer 1

font_import(pattern = 'GARAIT')

In order to know the correct name, right click in your installed TTF font, select properties an use the name showed at the top of the "General" tab.

Answer 2

Just import them all, perhaps? It takes a while to run.

install.packages("extrafont")
library(extrafont)
font_import()

I've used Garamond, one of my favorite fonts, before.