Out of nowhere we hit the weirdest thing. Recording perfectly, went along to rest, in addition to day that is next have always been experiencing this:
Pro Tools does not recognize Apollo Twin Duo in Setup/Hardware/ peripherals.
Playback sound just comes away from iMac speakers (whenever we mute Apollo monitor we still hear professional tools playback, but electric electric electric guitar attached to Apollo input is released of speakers and it is controlled (muted, volume up/down) by Apollo monitor settings.
Apollo is acknowledged by iMac and seems as chosen input/output device in system preferences/sound.