I'm writing a RealityKit/ARKit app that runs on iOS. Starting with Xcode 16.0 beta 1, at least through Xcode 16.1 beta 2 (16B5014f), in the iOS 18 simulator, my app randomly crashes in about 20% of app sessions the first time it attempts to present an ARView. The crashes seem to occur at multiple points within RealityKit and Metal. Below, I've included screenshots of the call stacks of the crashes, which occur as a result of both EXC_BAD_ACCESS and assertion failures within RealityKit. The app only crashes in the iOS 18 simulator, and does not crash in the iOS 17 simulator or earlier. The app only crashes in the simulator, and does not crash on a device running iOS 18. Before I investigate further, I'd appreciate it if an Apple engineer could give me a sense of if these crashes are most likely the result of known issues within RealityKit and/or the simulator, or if your opinion is that there are probably bugs in my app's code. I've submitted several feedback issues in the past, and I'd love to submit this issue too, but I expect that I would spend many hours attempting to create a repro case in a sample app. Understandably, I'd rather not spend this time if an Apple engineer could tell me this is a known issue, for example. Thank you.

New in iOS 17.5 is UIImpactFeedbackGenerator/impactOccurred(at:), which generates haptic feedback at a specific screen location. https://developer.apple.com/documentation/uikit/uiimpactfeedbackgenerator/4403143-impactoccurred Which devices support this? How does this work if the Taptic Engine has a fixed physical location?

In Xcode 16, when I use File > New > Project to create a new iOS app project, Xcode automatically creates an asset catalog file called Assets.xcassets in the project. However, if I later use File > New > File from Template, for example to add an asset catalog to an embedded Swift package within a project, Xcode suggests the default filename Media.xcassets for the file, instead of Assets.xcassets. Why is the default name for this file different in each context? Thank you for explaining this troubling consistency issue which causes me to lie awake at night.

Starting with iOS 18.0 beta 1, I've noticed that RealityKit frequently crashes in the simulator when an app launches and presents an ARView. I was able to create a small sample app with repro steps that demonstrates the issue, and I've submitted feedback: FB16144085 I've included a crash log with the feedback. If possible, I'd appreciate it if an Apple engineer could investigate and suggest a workaround. It's awkward to be restricted to the iOS 17 simulator, which does not exhibit this behavior. Please let me know if there's anything I can do to help. Thank you.

In Xcode, when you type a word like "don't", a second apostrophe is automatically inserted after the word and you have to manually delete it. Repro steps: Create a new empty Markdown file or XML file. Open the file in Xcode. Type the word “don’t”. Expected behavior: The word “don’t” appears. Observed behavior: The word “don’t” appears, followed by an extra single quote.

Is there a way to permanently disable PHASE SDK logging? It seems to be a lot chattier than Apple's other SDKs. While developing a RealityKit app that uses AudioPlaybackController, I must manually hide the PHASE SDK log output several times each day so I can see my app's log messages. Thank you.

In iPadOS 26.0 betas 1 through 5, the navigation bar can appear inset underneath the status bar (FB18241928) I submitted this bug in June with a sample project and repro steps, but I didn't get a response. Please let me know if there's anything else I can do to help. Thank you.

RealityKit spatial audio crackles and pops on iOS 26.0 beta 5. It works correctly on iOS 18.6 and visionOS 26.0 beta 5. The APIs used are AudioPlaybackController, Entity.prepareAudio, Entity.play Videos of the expected and observed behavior are attached to the feedback FB19423059. The audio should be a consistent, repeating sound, but it seems oddly abbreviated and the volume varies unexpectedly. Thank you for investigating this issue.

I posted https://developer.apple.com/forums/thread/809481 yesterday about an issue I discovered with pushWindow in visionOS 26.2 RC, but today I discovered a second problem with pushWindow. If window A calls pushWindow to present window B, and the user pins window B to a wall, the following unexpected behaviors are observed: Window B spontaneously disappears. If the user re-launches the (still running) app from the visionOS home view, both window A and window B appear simultaneously. I assume only window B should be visible at this point, since window A pushed window B. If the user closes window B, it's now impossible to present window B again. Calls to pushWindow appear to be ignored. If the user force-quits the app and relaunches it, and pushWindow is called again, window B appears, but window A remains visible. I also noticed this surprising behavior: This broken state of pushWindow behavior now affects all other apps on the system that may call pushWindow in the future, not just the app whose pushed window was pinned above. A workaround is to reboot the device, and then the system will behave as expected until the next time the user pins a pushed window.

I am using the Xcode 26.3 Claude Agent feature. Claude Agent can’t access on my Desktop folder when they are specified as chat attachments because I accidentally denied access to that folder when it was first requested. I had earlier read the Xcode 26.3 release notes, so I was somewhat aware of this known issue, but I didn't make the connection when the Desktop access prompt appeared. I wasn't expecting the permissions prompt, because the regular (non-agent) Xcode Claude is able to freely access Desktop files when they are specified as Xcode coding assistant chat session attachments. Claude Agent isn’t listed in macOS Settings > Privacy & Security > Files and Folders, so I can’t fix the permissions there. The TCC database contains these rows: % sqlite3 ~/Library/Application\ Support/com.apple.TCC/TCC.db \ "SELECT service, client, datetime(last_modified, 'unixepoch', 'localtime') as last_modified FROM access ORDER BY last_modified DESC" | head -2 kTCCServiceSystemPolicyDownloadsFolder|/Users/drew/Library/Developer/Xcode/CodingAssistant/Agents/Versions/26.3/claude|2026-02-07 15:19:25 kTCCServiceSystemPolicyDesktopFolder|/Users/drew/Library/Developer/Xcode/CodingAssistant/Agents/Versions/26.3/claude|2026-02-07 13:38:07 but I can’t seem to reset them using tccutil, apparently because /Users/drew/Library/Developer/Xcode/CodingAssistant/Agents/Versions/26.3/claude is not a valid bundle identifier: % tccutil reset all '/Users/drew/Library/Developer/Xcode/CodingAssistant/Agents/Versions/26.3/claude' tccutil: No such bundle identifier "/Users/drew/Library/Developer/Xcode/CodingAssistant/Agents/Versions/26.3/claude": The operation couldn’t be completed. (OSStatus error -10814.) I would like for Claude Agent to be able to access my Desktop folder. What is an appropriate next step? Thank you for any help you can provide.