Missing Fonts When Printing On Mac

Hello all,

I have, for years, had a very inconvenient problem. I'm in the publishing business, and when printing a PDF composited via Acrobat from many PDF sources, using the Combine Files tool, it never prints correctly. The individual files most often do print correctly.

These are songbooks I'm working on, and often the noteheads and various text fonts in the music (saved as PDFs using the music notation software Sibelius) are missing. See sample attached.

When my colleagues using PCs print, it prints correctly 100% of the time. It is only my Mac that does this. I have the latest Mojave OS update on a Retina 5K iMac.

I have to send the print into Kinko's every time. Incredible inconvenient. Any tips out there? Thanks in advance. I've tried re-saving in Preview. Same problem.