AIR 21.0 UNKNOWN Publisher During Installation (Mac Only)

I have a certificate that I got from DigiCert that I'm signing my .air files with through Flash Builder. When I run the .air file on Windows to install the app, the Publisher is displayed properly as my company's name. However, on Mac, the Publisher shows up as UNKNOWN.

I have a Mac that still has AIR 17 installed and if I compile an application using the AIR 20.0 sdk, I get UNKNOWN publisher, but if I compile using AIR 16.0 sdk, the Publisher shows up properly on that AIR 17 machine. All the other Macs in the office have AIR 21 installed and both versions of the app, compiled with AIR 16 and AIR 20 sdks, show the UNKNOWN publisher when installing on them.