Greasy Fork镜像

how do you use this thing i have tamper monkey i am using mac does it not work on mac

first you press the three dots next to your profile in chrome then click extensions then manage Extensions the toggle the developer mode from off to on then go to khanhack.com and follow the steps if you don't under stand then watch this youtube video:https://www.youtube.com/watch?v=zfN-8sl2YOw