Run action when mac unlock

locker.py

import logging
import os

# pip install pyobjc
from AppKit import NSDate, NSDistributedNotificationCenter, NSObject, NSRunLoop

logging.basicConfig(
    level=logging.INFO,
    format="[%(asctime)s] %(levelname)s [%(funcName)s:%(lineno)d] %(message)s"
)


class NotificationHandler(NSObject):
    def init(self):
        self = super(NotificationHandler, self).init()
        if self is None:
            return None
        self.dnc = NSDistributedNotificationCenter.defaultCenter()
        self.dnc.addObserver_selector_name_object_(self, 'didWakeNotification:', 'com.apple.screenIsUnlocked', None)
        return self

    def __del__(self):
        self.dnc.removeObserver_(self)

    def didWakeNotification_(self, notification):
        # sudo required
        os.system('killall mDNSResponder')
        logging.info('mDNSResponder was killed')


def main():
    # not used, but require save the link to obj for work
    notification_handler = NotificationHandler.alloc().init()  # noqa

    while True:
        NSRunLoop.currentRunLoop().runUntilDate_(NSDate.dateWithTimeIntervalSinceNow_(0.1))


if __name__ == '__main__':
    main()