Question about multiple instances of same project in parallel macOs

Hi, I've just started developing a .Net core command line application on mac and I've come across a challenge I'm not able to beat on my own. I'm trying to run multiple instances of this project at the same time (need to add staring arguments to that), and I saw that you can do that on windows (pretty easily i think?) by writing a batch file which contains something like this multiple times: 'start .\ProjectName\bin\Debug\something.exe '. I've tried doing that by writing a shell script and using command dotnet run, but it doesnt run in parallel. Could someone please help me?