Quit the existing AIR on MAC. and simply double click the downloaded imag file. It will initiate AIR installation.
Rock OS (Roon) on NUC 2016 Model (ETH Wired to Router) > Cat8 from Router to switch to 220Pro (CI) > RAAT/AIR > Monitor Audio PL300 II
Ipad Mini 4/iPhone for Roon Remote"
Ipad Mini 4/iPhone for Roon Remote"