I am using a MacBook Pro (os : Mojave) and Pycharm IDE for python. I was tried to open my web cam using OpenCV and python with the below code ``` import numpy as np import cv2 cap = cv2.VideoCapture(0) while True: ret, frame = cap.read() cv2.imshow('frame',frame) if cv2.waitKey(20) & 0xFF == ord('q'): break ``` But it all ways gives following error **Process finished with exit code 134 (interrupted by signal 6: SIGABRT)** What are the solutions for this?