A Summary of the WWDC25 Group Lab

Our application has initiated an NSURLSession data task, and we have received an initiation ID. However, Application not received callback on the subsequent activity: the task has not been requested, has not timed out, and no error callback has been received. [06/17 09:29:40:559][ 0x282a7d8c0] Requested TaskIdentifier 120 2025-06-17 09:29:40.623337 +0530 nsurlsessiond SUBMITTING: com.apple.CFNetwork-cc-166-373-Task .<120>:A71666 default 2025-06-17 09:29:40.631280 +0530 dasd Submitted Activity: com.apple.CFNetwork-cc-166-373-Task .<120>:A71666 at priority 10 default Seen couple of rejection with for CPUUsagePolicy and MemoryPressurePolicy 2025-06-17 09:29:40.989360 +0530 dasd com.apple.CFNetwork-cc-166-373-Task .<120>:A71666:[ {name: CPUUsagePolicy, policyWeight: 5.000, response: {Decision: Must Not Proceed, Score: 0.00, Rationale: [{[Max allowed CPU Usage level]: Required:90.00, Observed:95.00},]}} {name: MemoryPressurePolicy, policyWeight: 5.000, response: {Decision: Must Not Proceed, Score

Hello Engineers My app was rejected with the message below, BUT I don't have this entitlements in my project! I already removed all Xcode files under ${HOME}/Developer/Xcode, but the problem still alive! Guideline 2.4.5(i) - Performance In order to continue reviewing your app, we require additional information. Your app uses one or more entitlements which do not appear to have matching functionality within the app. Please reply to this message in App Store Connect and describe how and where the app uses the following entitlements. You will not need to upload a new binary to provide this information. Apps should have only the minimum set of entitlements necessary for the app to function properly. If there are entitlements that are not needed, please remove them and submit an updated binary. You will need to Developer Reject the app to upload an updated version. com.apple.security.assets.pictures.read-write com.apple.security.assets.movies.read-write com.apple.security.assets.music.read-write com.apple.security

In WWDC25 Metal 4 released quite excited new features for machine learning optimization, but as we all know the pytorch based on metal shader performance (mps) is the one of most important tools for Mac machine learning area.but on mps introduced website we cannot see any support information for metal4.

WWDC25: Combine Metal 4 machine learning and graphics Demonstrated a way to combine neural network in the graphics pipeline directly through the shaders, using an example of Texture Compression. However there is no mention of using which ML technique texture is compressed. Can anyone point me to some well known model/s for this particular use case shown in WWDC25.

I've been using /usr/bin/shortcuts for various tasks (eg. Quicksilver uses it to list and run shortcuts), and after updating from 14.7.4 to 14.7.5 the tool gets killed on startup. Eg. here is what it looks like in my shell: ❯ shortcuts list zsh: killed shortcuts list (And this is regardless of whether I have full disk access or developer tools toggled on or off for iTerm.) Looking at system logs it seems like the binary is missing an entitlement, which causes MACF / Gatekeeper to throw a fit: 2025-04-12 18:38:48.847576 kernel: mac_vnode_check_signature: /usr/bin/shortcuts: code signature validation failed fatally: When validating /usr/bin/shortcuts: in-kernel: com.apple.shortcuts.ShortcutsCommandLine disallowed without com.apple.private.security.restricted-application-groups 2025-04-12 18:38:48.847582 kernel: validation of code signature failed through MACF policy: 1 2025-04-12 18:38:48.847583 kernel: check_signature[pid: 2475]: error = 1 2025-04-12 18:38:48.847587 kernel: proc 95761: load code signa

While validating a Dolby Vision Profile 5 playlist in CMAF format (with segments in MP4), the Media Stream Validator reported the following error in the MUXT-FIX-ISSUES list: However, the playlist correctly specifies Dolby Vision Profile 5 in both the EXT-X-STREAM-INF and EXT-X-I-STREAM-INF tags. Playlist: #EXTM3U #EXT-X-VERSION:8 #EXT-X-INDEPENDENT-SEGMENTS #EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=audio-ec3,LANGUAGE=und,NAME=Undetermined,AUTOSELECT=YES,CHANNELS=6,URI=var14711339/aud1257/playlist.m3u8?device_profile=hls&seg_size=6&cmaf=1 #EXT-X-STREAM-INF:BANDWIDTH=14680000,AVERAGE-BANDWIDTH=14676380,VIDEO-RANGE=PQ,CODECS=ec-3,dvh1.05.06,RESOLUTION=3840x2160,AUDIO=audio-ec3 var14711339/vid/playlist.m3u8?device_profile=hls&seg_size=6&cmaf=1 #EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=1419881,URI=trk14711339/playlist.m3u8?device_profile=hls&cmaf=1,VIDEO-RANGE=PQ,CODECS=dvh1.05.06,RESOLUTION=3840x2160 Could you please review this and clarify: Why is the Media Stream Validator reporting this error, e

We are seeking clarification on the behavior of App Store Server Notifications V2. Summary In our production environment, we received a notification with notificationType: DID_FAIL_TO_RENEW and subtype: GRACE_PERIOD. However, the gracePeriodExpiresDate field in the payload was null. We understand this notification indicates that a user's subscription has entered a grace period. The null value for its expiration date is unexpected, and we are looking for an official explanation of this behavior and the correct way to handle it. The Scenario Here are the details of the notification we received: Notification Type: DID_FAIL_TO_RENEW Notification Subtype: GRACE_PERIOD Environment: Production Upon decoding the signedRenewalInfo JWS from the responseBodyV2, we found that the gracePeriodExpiresDate field inside the JWSRenewalInfoDecodedPayload was null. The notificationUUID for this event was in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. Our Implementation and its Impact Our backend is designed to ensu