New HD client requires windows higher than 98. The crossover for mac guide says one should configure wine with windows 98. I can play on old client on win 98, can't install new HD client on win 98.
I can't even install it, I don't have MapleSaga.exe. I mean I have it in Downloads folder on mac. The Crossover uses this exe to install but it can't install. I have just wine and crossover config I play on older version no problem, it is something I don't need now but I'm afraid I will stuck with my version some day
You won't be able to play on the older version after tomorrow. Try to configure wine with a different Windows version (not Windows 98) and run the installer again.
After installing, try to set it back to the recommended settings from the guide again and run the game.