Macintosh MapleLegends wont open on crossover

did you try downloading the other crossover version?

 

Other people have found that the older version of crossover works for them on their M1 chip mac devices.

 

When I tried playing the game with the latest version it always crashed / never opened the game.

I installed the older version and it seems to work.
I for one use a M1 Air on Monterey, not sure if it works on Ventura though.

Other than that, look at the legends.ini file in the folder, see that it has the graphics down to 0 (800x600) or 1 (1366x768) because the higher res one doesn't work.

On Crossover you have an option to enhance the graphics (should be stated on the Mac guide too) I remember trying out enabling/disabling it and it worked, not sure if with or without it anymore.
Haven't played in months, but I remember it being quite easy.