In 2017 I replaced my 1st gen SoundSticks with a pair of black Audioengine A2 powered monitors. They have their own DACs built in, so all you have to do is plug them into a USB port and select them as the Output source in System Preferences > Sound. They’re tiny and the sound is great, better mids and highs than the SoundSticks, and I don’t really miss the lessened bass compared to the HK’s subwoofer unit.
The units have since been upgraded to the A2+ model ($269) which also integrates BlueTooth audio, so you could use them connected to your Mac as well as stream from any other audio device - or you could just make them wireless for the Mac as well. (Since Bluetooth audio is of lesser quality than connected or AirPlay, I’d recommend connecting them to the Mac.)
They come in black, white or red, and can be purchased from them directly or from shops like Amazon, B&H, Crutchfield, etc.