How to change Internet Sharing subnet on Mac OS

1. Copy the plist file /Library » Preferences » SystemConfiguration » com.apple.nat.plist to your home directory, eg: sudo cp /Library/Preferences/SystemConfiguration/com.apple.nat.plist ~ 2. Use Xcode’s Property List Editor (or any other property list editor) to edit the file in your home directory (you may need to change permissions on it to be able to modify/save it) [...]