How do I get Old English Font in mac word?

Old English was never included with Office. I checked my saved font installs for Office X, 2008, 2011, 2016 and 365. It's not there. Nor in the fonts provided by OS 9, or any version of OS X / macOS.

In my couple of jillion fonts, the only source of Old English is Adobe's Type 1 Postscript (and later Font Folio 11 OpenType) version, and a slightly different version from Agfa MonoType.

Other than that, it doesn't matter how old the font is, just that it's a type the Mac can use. Any PC TrueType font, Mac legacy TrueType, Mac Type 1 PostScript, or any flavor of OpenType will do.

Amusingly, I have a June 1992 v001.003 Monotype Old English Text MT Regular TrueType font face here. 247 characters. This may be a fugitive font from a really old Photoshop 3/Illustrator 8 installation. Still works in Pages v7.3, LibreOffice v6.1.4.2, but does not show up in the font menu for TextMaker rev942 in SoftMaker's Office 2018 Suite.

You should ask Microsoft.

https://support.microsoft.com/en-us/contactus/

The oldest one I have is from 1996. Still works. 🙂

This might also be of some help regarding Old English fonts

https://itstillworks.com/12528686/how-to-get-old-english-fonts-in-microsoft-word