Hey there! I just verified that there will not be a Mac version of the Contest version of RMMZ. Sorry about that!
Viewing post in Error Downloading RMMZ
That is very disappointing. Could I create a game in one of the older RPG makers for the contest and import it into a trial version of RMMZ? I purchased RPG Maker MV in 2018 and hopefully could work on the story there and then transfer my work to MZ. Is there an import project function in the new version?