Thanks Akimo.

Your old AC200 is happily supplying my new DSP6ks, thank you for that.

iMac is set not to sleep already, I might dig around a bit more in the Preferences settings as I suspect they're the problem.

Sooloos, Roon, G series (with LPS upgrade), 800 series (with LPS upgrade), HD621, AC200, Prime and PS, DSPs old and new.

Purdeys, Moke, Leica, 'Blad. Only the best.