Although, I realise that Soundspectrum has now given up on these, this, their sunset, is actually their time to shine. Wonderful. Just glorious. Highly recommended, to all who still can get these running

( Note that, for instance, the free Ginger Audio Caster or their previous Cube is required to route the audio to the stand-alone visualizers on a current OSX installation, the old audio routers such as the soundflower no longer work )
( Although, I somewhat hesitate to recommend someone to buy these as a first-time purchase due to the possible lack of future updates, but for the rest of us - give them a spin on the new M2! Enjoy them as they were meant to be one final run, before they stop working)