Hi, I had the same problem too with message" This system does not support fullscreen mode" while running an old dos game The fate
of Atlantis. The resolution i found is to :
0. download a program called dos box. [ use this link to download Dosbox app: http://www.dosbox.com ]
1. Install DosBox.
2. Run the DosBox program
3. Mount the drive and directory where the games executables are found(There is a help in the application on how to do this)
ex. mount c c:\Atlantis\
4. Type c: ( c is the drive you have mounted in 3 above)
5. Type the executable file name.
Here you go, it worked fine for me.
Make sure you set your display settings to the lowest possible pixel settings (I used 800 x 600 pixel)
Enjoy and ask if you need any help!
on a high-end machine will roughly be the equivalent of a 486 PC.
DOSBox can be configured to run a wide range of DOS games, from
CGA/Tandy/PCjr classics up to games from the Quake era.]
Link for downloading Dosbox