I have a webpage that will display notifications to OS X's notification (system notifications). But it will disappear in 10 to 15 seconds. Is there a way to change how long it stays? (and what about change to not disappear at all?)
I found several pages dated 2014, which suggested using
defaults write com.apple.notificationcenterui bannerTime 60
3 instead to make it 3 seconds. But this method doesn't work for my Mavericks and El Capitan OS X.