Triple M Mackay &amp; The WhitsundaysTriple M Mackay &amp; The Whitsundays Triple M Mackay & The Whitsundays Triple M Mackay & The Whitsundays (ACMA callsign: 4RGM) is an Australian radio station in Queensland. Owned and operated as part of Southern Cross Austereo's Triple M network, it broadcasts an adult contemporary format to Mackay, Queensland and the Whitsunday Islands. First broadcast on 21 September 1999, it was established by RG Capital – later sold to Macquarie Regional RadioWorks and Southern Cross Media Group – and is based in the Suncorp building on Victoria Street in Mackay, alongside sister station Hit Network. Triple M Mackay & The Whitsundays Triple M Mackay & The Whitsundays (ACMA callsign: 4RGM) is