I’ve been getting annoyed recently with the amount of simulators I had installed in Xcode at work. But I’ve come across a really simple command that will fix this automatically.

I had 10.1, 10.2, 11.0. 11.1, and 11.2 installed, which I then reduced to just two of them. Then instead of painfully selecting and deleting each generated simulator, I just typed this:

fastlane snapshot reset_simulators

It uses Fastlane’s Snapshot tool, and what it does is delete all of your current simulators, and generate a set of new ones depening on the current SDKs you have installed.