I’ve been on a quest to have less meetings in this world. But since that doesn’t seem likely, I’m settling on shorter, more specific meetings. One of the ways I’ve been trying to achieve this is to send a key called “Default duration in minutes for new event” into com.apple.iCal with an integer. In this case, I’m going to reduce my default meeting times to 15 minutes. defaults write com.apple.iCal 'Default duration in minutes for new event' 15 And viola, just like that I get to have less time spent in meetings! Note that this doesn’t change the default time of Quick Events.