Ok so I was able to run a server for other versions such as 1.7.10 perfectly fine but when I try to double click on forge-1.12.2-14.23.4.2739-universal.jar the GUI text box is empty and is at 0.000 ms always. I am currently using macOS Sierra.
When I try connecting to the server it tries to log me in but doesn't let me join
I need help to fix this.