I am seeing kmutil being executed a *lot* on my iMac with Big Sur. Apple's documentation says kmutil is used for loading and unloading kexts (and some other things). Should I be concerned with this much kmutil activity?

I am experimenting with RealityKit to set up a portal. Everything works, but I was wondering where the scene's origin is with respect to the front of the portal window? From experiments, the origin's X and Y appear to be at the center of the portal window, while the origin's Z appearing to be about a meter behind the portal window. Is this (at least roughly) correct? Is it documented anywhere? PS. I began with the standard visionOS app and edited the Reality Composer Pro file to create the scene.

I have recently restarted an old code base. The app uses App Groups to communicate with network and endpoint system extensions. For some reason, in Xcode > Target > Signing & Capabilities the app groups are showing up with red text. I feel the red signifies a problem, but I cannot figure out what it is. The app compiles and runs, but I feel there is problem that I am missing. Any idea why App Group names would be displayed in red?

Apple provides sample code for compressing a single file here, but the "aa" command and Finder cannot decompress these files. I needed to write a custom decompresser using Apple's sample code here. Apple provides sample code for creating an "aar" file for directories here and a single string here, and the aa command and Finder can deal with these. However, I have struggled creating an ".aar" file for a single file. The file could be quite large, so reading it into memory and writing it as a blob is not an option. Does anyone have suggestions or can point me to Apple documentation that can create a ".aar" file for a single file?

I just started a new Xcode project based on the AR template, and I went to set a couple of build settings, but I couldn't find them. Namely:Swift Compiler - Search Paths > Import PathsandSearch Paths > Library Search PathsHave these been renamed or moved? Or am I just missing something very obvious?Thanks.Xcode Version 10.2 (10E125)macOS Version 10.14.4

Apple's RoomPlan demo software page says it is powered by RealityKit, but I am having troubles finding any hooks into the standard RealityKit APIs. For example, RoomPlanView doesn't seem to be related to ARView, and I cannot find any Scene property to access (or add) RealityKit entities. Does anyone know if these RealityKit classes are accessible through RoomPlanView? Note: I did find the ARSession through roomCaptureView?.captureSession.arSession

In WWDC25 session What’s new for the spatial web, the presenter showed creating an immersive environment for a web page by adding to the page's HEAD section <link rel="spatial-backdrop" href="office.usdz" environmentmap="lighting.hdr"> My first attempt failed, and I am trying to track down why. Before I search all the potential failure paths, I wanted to ask the community, Is this feature available in the latest visionOS 26 beta? I haven't seen anyone talk about their use of the feature yet.

This is just an FYI in case someone else runs into this problem. This afternoon (12 Dec 2025), I updated to macOS 26.2 and lost my network. The System Settings' Wi-Fi light was green and said it was connected, but traceroute showed "No route to host". I turned Wi-Fi on & off. I rebooted the Mac. I rebooted the eero network. I switched to tethering to my iPhone. I switched to physical ethernet cable. Nothing worked. Then I remembered I had a beta of an app with a network system extension that was distributed through TestFlight. I deleted the app, and networking came right back. I had this same problem ~2 years ago. Same story: app with network system extension + TestFlight + macOS update = lost network. (My TestFlight build might have expired, but I'm not certain) I don't know if anyone else has had this problem, but I thought I'd share this in case it helps.

I have had my Apple Vision Pro headset working with Xcode before, but it has been a while since testing in the headset. Today, Xcode on my M1 Mac Studio could not see my Apple Vision Pro to run code on the headset. I have updated my headset to visionOS 2.4 developer beta Both Mac and headset are on the same Wi-Fi network (I am typing this on my Mac via Mac Virtual Display). Headset has developer mode turned on. Initially I tried on the latest macOS (15.3.x) an Xcode (16.2) releases, but Xcode failed to find the headset. I installed the lated Xcode beta (16.3 beta), but it still failed to find the headset. I installed the latest developer beta on my Mac (15.4), but neither Xcode (16.2) nor Xcode beta (16.3) can find the headset. When I try to manage devices in Xcode, my Apple Vision Pro headset does not appear. Any idea what I am missing?

I like the toolbar visionOS's Safari uses for back & forward page, share, etc. It floats above the window. My attempt to do this with ornaments isn't as satisfying as they partially cover the window. My attempts with toolbar haven't produced visible results. Is this Safari-style toolbar for visionOS exposed by Apple in the API's? If so, could someone point me to documentation or sample code? Thanks!

Apple's new Spatial Personas use Gaussian Splatting, but I have not found any APIs for visionOS to display a Gaussian Splat like a PLY file. Am I just missing the Apple documentation? If not, are there common practices developers are using for displaying Gaussian Splats in visionOS?

In Reality Composer Pro, why is the Sky Sphere so much larger than the Sky Dome? By my estimate, the Sky Sphere has a radius of 100m, while the Sky only has a radius of only 12m.

I have a visionOS app using Apple's WebView and WebPage to display web content. When viewing a live YouTube stream last night, YouTube put up the warning in the area that would have the chat window: Oh no! It looks like you're using an older version of your browser. Please update it to use live chat. Anyone know if YouTube is generating this from the server based on the WebPage's user agent string, from Javascript running in the browser engine, or something else? Anyone know if and how it is possible to resolve this? (See right side of YouTube web page from a screen grab):

Apple's WWDC video What’s new for the spatial web says the spatial-backdrop markup may change as it goes through the standards process (at 27:26 mark). I have started adding spatial-backdrops to web pages, so I want to keep an eye out for status updates by Apple and follow the standards progress. Is there any place I can keep an eye on this standards process? Has Apple announced any feature updates or news on spatial-backdrops?

I have an iOS app that can display a USDZ model downloaded from the Internet (and cached locally) via an ARView. I would like to light that model with an image based light (IBL) also downloaded from the Internet. However, as far as I can tell, ARView can only create an IBL from a resource that has been compiled into the Xcode project and loaded with EnvironmentResource(named:in:) or EnvironmentResource.load(named:in:). Is there a way to create an EnvironmentResource from an HDRI via a file URL to use in ARView in iOS?