Issue on Mac

got the lastest i can get macOS wise, but still getting this error

“Warcraft III Error
Unable to initialize graphics. Please ensure your
operating system and display drivers are up to date.”

I have MacOS High Sierra 10.13.6
and because my computer is 2011 built that is the latest OS i can get as i cant go to catalina

i know my system isnt the greatest setup but was always able to play my wc3 TFT but now i cant and it is some what annoying me

any Ideas?

Graphics card isnt ideal Amd Radeon HD 6770M 512mb but its more then enough for TFT well atleast it was