“Xcode”

I can already tell you, nothing works for me anymore. I updated to macOS 26.4. This morning, it updated Xcode to 26.4 as well. As a result, I had to reinstall Codex, which I did. I logged in, and now nothing works at all. I can submit a request in the chat, sometimes I get a short response, and then it starts thinking about something and never stops. I think it is amazing what kind of unfinished mess Apple is delivering once again. This is absolutely unbelievable. I am furious that such a broken system is being provided to us developers. It would be the easiest thing for Apple to simply test Codex. If they are not even providing us with the latest Codex versions and instead releasing outdated versions with their Xcode, it is outrageous that we are given something so completely unfinished and nonfunctional. With macOS 26.3 and Xcode 26.3, I was at least able to program perfectly fine with Codex and developed several apps. Now I wake up in the morning, want to continue working on my a

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

So it appears to be the same failure we are talking about here: https://developer.apple.com/forums/thread/814076 I just updated that thread, but the bug described there (FB21805212) was fixed in macOS 26.4. Also, to be clear, the bug was specifically in smb, NOT copyfile itself. However... It has data. I can read the filenames when I view it as 'plain text’. The Resource fork is less than 300 bytes, but that is enough for it to cause copyfile to fail. The total file size is ~12kb. That doesn't sound like the bug above. The bug above was caused by the SMBClient incorrectly accounting for large xattr size, which then caused the copy to fail. I don't think it would have happened with small xattrs (certainly not 300 bytes). FYI, the Finder (and other copy engines) work because they're using the ..namedfork accessor, when it ends up going through a totally different code path in smb. Interestingly, .DS_Store causing problems with copying is infamous enough to have a mention on Wikipedia: Yes, but I think

Thank you for sharing your post. I understand that it can be frustrating, especially when the job is impacting your daily routine. I am eager to assist you in any way I can. I have a potential idea, but I would like to request a bug filing for further investigation. Typically, authentication tokens expire after a few hours. In a stable build, Xcode silently uses a “refresh token” to obtain a new session in the background. Consequently, the system may be terminating your session when the initial token expires. This is an issue that requires immediate attention. However, I am only speculating about the cause. Given that this issue is occurring across two separate computers and began specifically in beta 3, it is highly probable that the problem lies within the beta itself rather than a misconfiguration on your end. Instead of simply signing out and signing back in, I recommend completely deleting the integration from Xcode. Navigate to Xcode > Settings > Accounts (or the specifi

Our engineering teams need to investigate this issue, as resolution may involve changes to Apple's software. Please file a bug report, include a small Xcode project and some directions that can be used to reproduce the problem, and post the Feedback number here once you do. I'll check the status next time I do a sweep of forums posts where I've suggested bug reports and post any information about changes I am able to share to this thread. Bug Reporting: How and Why? has tips on creating your bug report.

I don't normally complain. But I am unpleasantly surprised that Apple shipped Xcode Version 26.4 (17E192) with its known Anthropic OAuth token bug. Xcode 26.4RC and the RC version have proven to be less stable in using Intelligence, specifically Claude than was Xcode 26.4b3. Please folks, test better before releasing.

All apps should build with the latest SDK, so you have access to the latest APIs, regardless of the distribution mechanism used. Regarding the UIDesignRequiresCompatibility questions, it's useful to see how this was described in the WWDC25 Platforms State of the Union: As you evaluate your app's UI and the time you need to adopt the new design, we're providing an option to continue to use your app's current design with Xcode 26. We intend this option to be removed in the next major release. Hopefully you're on your way with the adoption of the new design already, or have upcoming plans to tackle it. You'll have to look at your own specific situations and determine how long you can continue using it for specific hot fix situations against the above statements and the timing of your own planned adoption of the new design. What are the potential issues if a team continues development on Xcode 16 while others have migrated to Xcode 26? For example, could there be compatibility, build, o

Swift and Memory Safety What enhanced security features are useful for fully Swift apps? Enabling enhanced security features like PAC, EMTE, and typed allocations is still useful in Swift apps. In certain language modes, Swift apps which do not use unsafe can still have memory corruption issues due to data races (concurrently modifying a reference can cause reference counting errors). Similarly, although your application may be fully safe Swift, it may interact with libraries (provided by Apple or third parties) which are not fully memory safe, and so turning on enhanced security features will help protect you against issues not caused by your code. How can I use unsafe Swift methods safely? Methods with unsafe in the name can be used safely, but it requires more care and attention to do so. You won't always be able to avoid using such methods, but you can carefully isolate such code and of course make sure to devote more effort to reviewing and verifying any code that uses unsafe methods or types. How can I

Xcode should never crash, so filing bug reports through Feedback Assistant are encouraged.

I’m having the same issues on Tahoe 26.3 and Xcode 26.3. Xcode can only push, not fetch or pull. Command line git works fine. I refreshed the Personal Access Token from GitHub and checked the required permissions but that didn’t fix the issue.