I have gotten BARD audiobooks to play on my Mac. There is no BARD client for macOS, and the BARD app in the App Store is not marked as macOS compatible, so normally it shouldn't work. However, I used ipatool to download the BARD Mobile IPA from the App Store, then I used the UnfairPlay IPA decryption tool on it, specifically its convert-ipa-macos command which marks iOS apps as compatible with macOS while retaining the encryption and code-signing. This let the IPA install when I opened it, and after that I could open the BARD Mobile app from Applications or from Spotlight, and I could log in and download and play books. I didn't even have to disable SIP or patch the app or anything like that, and apparently the device ID it sends to NLS (which is based on different hardware and OS information) was accepted, even though its a Mac and not an iPhone or iPad. I could have ran BARD Express in Parallels or BARD Mobile in AAE instead, but I like being able to use the play/pause button on my keyboard to control playback no matter what I am doing, and this is lighter than having to have a full VM or emulator running just to play BARD books.