Just bought DOS2 from the mack app store
even with gama sert to max and brightness and contrast arso max it is to dark to see anything
Model Name: iMac
Model Identifier: iMac15,1
Processor Name: Quad-Core Intel Core i7
Processor Speed: 4 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Hyper-Threading Technology: Enabled
Memory: 16 GB
System Version: macOS 10.15.7 (19H2)