Old English Font for iMac

PS After you have downloaded your font from the web, here is the info for installing, etc.

https://support.apple.com/guide/font-book/welcome/mac

(Fonts you install can normally be used in all apps, and Mac's do not require any kind of special font)

downloads for what?

Fonts normally work for all platforms and all apps. Just do a google search on the kind of font you want to find downloads for yourself.