It is possible that Xcode starts downloading it via nsurlsessiod so you can block it either Locking the folder will stop Xcode from copying the simulator files from the iPhone to that folder next time you connect them. Since the above is not okay for iTunes syncing etc, try the following:ĭelete the contents of the folder '~/Library/Developer/Xcode/iOS DeviceSupport/' and then right click > get info > lock the folder. Connect iPhone to the Mac and pick 'Don't trust'.Remove all 'paired devices' in iOS settings > Developer.Delete the contents of '~/Library/Developer/Xcode/iOS DeviceSupport/'.You could also consider running DevCleaner from time to time to remove unnecessary Xcode-related files. There's an Xcode specific cache (not about simulators), ~/Library/Caches/.Xcode, which should be regenerated as needed, but may be less useful to clean up.So you may have files still there that you might want to delete (I did, on some older Macs some years back) The simulator related files used to be there until around Xcode 6. If you've been using this machine for some years, it may be worth looking for ~/Library/Application Support/iPhone Simulator.The Caches folder may grow over time as well, and you can remove contents from there, and they should be regenerated as needed. If you no longer need to run your apps on certain devices, you may consider removing those devices' corresponding folders in the Devices folder. It includes a Caches folder and a Devices folder.

~/Library/Developer/CoreSimulator/ contains simulator related data.

Thankfully, it is organized by date, so you can choose to keep specific folders inside it, and delete the rest ~/Library/Developer/Xcode/Archives/ contains data from your builds that can be helpful in the process of symbolicating/debugging deployed apps, but could otherwise be removed.If the objective is to free up disk space occupied by Xcode-related and simulator-related caches and data, and not just iOS support files, there are other folders you can look into to consider removing files, besides ~/Library/Developer/Xcode/iOS DeviceSupport/ and ~/Library/Developer/Xcode/DerivedData that have been mentioned in the other 2 answers so far.

Clean up junk files on iphone