Alongside the new iOS, tvOS, macOS and watchOS updates today, Apple has now pushed an update to iTunes for Mac and PC. This brings the software to version 12.7.3 and adds support for the HomePod.
According to Apple:
Aside from updates to the HomePod, the change log in the App Store does not mention much else. The update is available on the Mac App Store, as well as via the Apple Software update on Windows.
Earlier today, Apple announced that HomePod pre-orders would go live this Friday, with the official release being February 9th. Since then, we’ve received updates on iOS, tvOS, macOS, watchOS, and now iTunes that support the upcoming smart speaker.