I assume you mean the fonts are garbled on-screen, rather than when printed, so that it is not a printer driver issue?
Check some of the text elements of the offending project on the Mac. Are any of the font names enclosed in square brackets, such as [Arial]? The square brackets mean that the matching font is not available... happens on both Mac/Windows for any project. This could be the issue?
I've not seen this issue in 8 or more years... but way back when, it would be the localized version of a font that wouldn't come across correctly... for example, Arial Western on one machine would appear as Arial Cyrillic (e.g.) on the other and wouldn't work until I manually changed it.
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB