No audio on ATSC3 mpg files

I have Samba enabled on my Pi DVR and occasionally transfer recordings to my Mac. Most mpg files play just fine using QuickTime or VLC. However, I discovered that mpg files created from ATSC3 recordings have no audio. Anyone know how to fix this?

They do have audio, it's just in a codec your computer probably can't play: AC-4. Most devices that can play back Dolby Atmos can usually handle AC-4.