Install fonts

smithrancher wrote:

how to install new fonts on my Mac (downloading to Font Book doesn't work)

https://support.apple.com/en-us/HT201749

One way is to double click the fonts. Font Book should install them.

“Doesn’t work” isn’t a condition that we can address directly...

Do you see any errors or diagnostics displayed, or does the attempt fail silently?

What format are the fonts?

Are the fonts known not to be corrupt?