iOS 17.5 Simulator (21F79) fails to download

You have to manually download the simulator from the developer site using Firefox, because a browser company actually knows how to resume failed downloads. Once downloaded, you have to move the file out of the downloads directory, but nobody will tell you this (I moved it to the /Applications directory). Then run this command:

sudo xcode-select -s /Applications/Xcode.app

xcodebuild -runFirstLaunch

xcrun simctl runtime add "iOS_17.5_Simulator_Runtime.dmg"

This at least worked to the point that I was able to build my flutter app and upload it.

This was a huge pain that took me several hours, when a simple button to restart failed downloads would have made it take 15 minutes. I just got a fiber connection. I don't know why the downloads kept failing? All I know is that it's 2024 and large file downloads should be able to pick up where they failed at.

Removing the cache solved this issue for me

rm -r ~/Library/Developer/CoreSimulator/Caches

How did you did that ? on Terminal?

Thanks! This helped

Where exactly did you run that command?

I tried on Terminal and then tried downloading the "iOS 17.5 Simulator" again, but kept getting the same "error" ("Could not download")...