The Verge’s Creighton DeSimone:
Today, I found myself in the good old Mac App Store after trying to dismiss another notification and came face to face with the High Sierra banner, imploring me to upgrade. Trying to deal with this annoyance, I right clicked on the banner. To my surprise, I was given a prompt to “Hide Update”!
I generally wait to do a big system update on my Mac mini, since it’s the house file server and I don’t want to mess with it, but I hate dealing with this stupid Kobayashi Maru notification. If this works, it’ll make me a very happy camper indeed.