用python抓包

Question

#!/usr/bin/env python# -*- coding:UTF-8 -*-import socketimport structsniffer = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.ntohs(3))while True:    print sniffer.recvfrom(65565)    最近在学用python抓包，上面这段代码在linux下可以运行，输出报文内容，为什么到了mac下就不能运行了？求指导