how to fix non-responsive pico to uploading uf2 file code (mac laptop)

Hello! My pico board is unresponsive to the uploading of our code into the disk, or just simple led flashing code uploaded into Thonny. There's nothing that happens on the PCB board, LED light, literal no signs of life. Confused on how to fix this. I have a macbook air laptop and the cable and everything should be fine. Thanks!