I am unable to unmount them, either from the command line or Disk Utility. How do I go about this? Don't use Disk Utility to mange these installations or mount points. Instead, you can remove simulators with the xcrun simctl runtime delete command. Use xcrun simctl runtime list to get a list of identifiers. You can also do this inside of Xcode's Settings UI. Go to the Components tab, and you'll see a list of what is installed, and the Info button will lead you to an option to remove specific simulators. — Ed Ford, DTS Engineer
Topic:
Developer Tools & Services
SubTopic:
Xcode
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