would it be possible to make this downloadable in the itch.io mac app
I believe this was touched upon previously, and if I am remembering the right game, due to the filesize limitation itch has in place, the game is simply too large to be hosted on their servers. It is possible to use other download sources than itch for the app, but I believe those require a subscription based on how much storage and traffic is used by the files, which could be detrimental to the games development.