I bought different Maslow CNC parts from multiple places and finally found time to start assembling everything.
For Maslow CNC controller, I got The Blue Smoke Herder Shield - AKA the New Maslow Shield (TLE5206). I installed GroudControl on Mac, I successfully upgraded the firmware on the controller. I attached a couple of motors, and then I try “Actions => Test Motors / Encoders”, I hear some sound from the motors, they vibrate a bit, but the motor shaft doesn’t turn on both motors. I’ll continue digging deeper into this problem but decided to post this issue here in case somebody already faced something similar.