HomePod with imac
Does the new HomePod mini work with an iMac?
Yes, you should be able to use AirPlay, to stream music:
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- AirPlay other content to HomePod mini from iPhone, iPad, iPod touch, Apple TV, or Mac
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4 . Peer-to-peer AirPlay requires a Mac (2012 or later) with OS X Yosemite or later, or an iOS or iPadOS device (late 2012 or later) with iOS 8 or later or iPadOS.
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copied from: HomePod mini Technical Specifications - Apple