Open iOS Simulators directory in Finder

Xcode 6:

open ~/Library/Developer/CoreSimulator/Devices/. 

Xcode 3-5:

open ~/Library/Application\ Support/iPhone\ Simulator/.

Useful for manipulating stuff on the actual simulator device when developing an app that downloads or stores lot of data, or you need to debug Core Data issues, etc.

In Xcode 3-5, simulators are stored in directories by iOS version.

In Xcode 6, they are stored by simulator UUID. To figure out what simulator belongs to each UUID, look at the deviceType, name, runtime properties in the ~/Library/Developer/CoreSimulator/Devices/<uuid>/device.plist file.