Macintosh Issues playing on a Mac

Hi everyone, I'm new here and have mostly played Maple Story in the past on a Windows computer.
Recently, I got a Mac Mini and noticed this server supports Mac, so I thought to give it a try.
I'm on a Mac Mini with MacOs El Capitan. I followed the Mac installation guide on the forums, and installed Wineskin version which as it says, is compatible with El Capitan.
The game launches, but sometimes crashes after or even before I reached the login screen.
Sometimes, it crashes when I reach the character selection screen as well.
Was hoping if anyone can explain how to deal with this problem?
I also have a few general questions, like:
I'm on a weak processor - Intel Core Duo with 2.6Ghz, 6 GB Ram and 256MB video memory. Will the game run with these specifications? I thought pre-bb maple story is an old enough game to run on almost any computer.
Are there any gameplay differences when playing on a Mac or everything's the same?
Thank you