OK by this: I tried deleting iOS 18 runtime via Xcode Settings > Components, and even removed iOS 26 runtime then re-downloaded it. But the iOS 18 runtime keeps auto-reappearing right after! I also ran sudo rm -rf against the iOS 18 asset folder, and it just throws a permission error—totally useless. I checked the Info.plist under /System/Library/AssetsV2/com_apple_MobileAsset_iOSSimulatorRuntime/cc1f035290d244fca4f74d9d243fcd02d2876c27.asset/ and confirmed this folder is exactly the orphaned iOS 18.0 simulator runtime. I’m trying to delete this specific cc1f035290d244fca4f74d9d243fcd02d2876c27.asset folder but hit a wall with system permissions. I found this exact issue is already being discussed in the Apple Developer Forum thread here: Orphaned 9GB Simulator Runtime in /System/Library/AssetsV2 - Cannot Delete (SIP protected). It’s clearly a bug on Apple’s side with MobileAsset lifecycle management—these large orphaned simulator runtime assets get stuck in SIP-protected system directories, and Xcode
Topic:
Developer Tools & Services
SubTopic:
Xcode
Tags: