Remove unused XCode simulators

TLDR; Go to /Library/Developer/CoreSimulator/Profiles/Runtimes and delete your unused simulators.

To quickly open the directory. There are 3 ways:

  • From the terminal, run open /Library/Developer/CoreSimulator/Profiles/Runtimes.
  • In Finder, press Cmd + shift + g, paste the directory path.
  • In Finder, select Go menu, select Go to Folder....

To check for the directory size on disk, use du -d 1 -h <path>. For example:

# du -d 1 -h /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS\ 13.3.simruntime
6.0G	/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 13.3.simruntime/Contents
6.0G	/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 13.3.simruntime