Mac OS Increasing Priority for a Task/Process

Open the Activitiy monitor. In the cpu/memory tab you will see a column for PID. That’s the process ID.

To set that as a high priority run the following

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sudo renice -n -10 14394

I read somewhere that mac assigns process from -10 to 10. So should be nice to be within those bounds.

Renice is to be run second time but it worked for me. Read more here.