I running macOS 10.13.5 on my 2015 27" iMac. With the release of Airplay 2, I just purchased a pair of Homepods for use as stereo speakers for my iMac. I used my iPhone X's Home app to update that HomePod s/w and to pair them as stereo speakers. They sound awesome! However, I'm unable to use them as stereo paired speakers on my iMac, despite running the latest macOS version. It appears that macOS doesn't yet support Airplay 2. Is that correct? Seems like a huge oversight.