Hello there! I’m currently stuck with Xcode 26.0 beta 6 (17A5305f), as I can’t download the latest SDK/Simulator for iOS 26.0 beta 6 (23A5324a). The download constantly fails for days now with the following error message: (-67061 invalid signature (code or signature have been modified) Domain: SimDiskImageErrorDomain Code: 5 User Info: { DVTErrorCreationDateKey = "2025-08-26 21:11:30 +0000"; unusableErrorDetail = ""; } -- (-67061 invalid signature (code or signature have been modified) Domain: SimDiskImageErrorDomain Code: 5 User Info: { unusableErrorDetail = ""; } -- System Information macOS Version 15.6.1 (Build 24G90) Xcode 26.0 (24208.7) (Build 17A5305f) Timestamp: 2025-08-26T23:11:30+02:00 I’ve already tried re-downloading the Xcode beta 6 from the Apple Developer site. I’ve also tried restarting my Mac and even tried to use the command line to install iOS 26 beta SDK via xcodebuild -downloadPlatform iOS -exportPath ~/Downloads (as noted here). This lead to the same error message. Can someone help? I’m unable to develop my apps right now! 🫠 I’ve also filed a feedback: FB19915834

I'm currently working on my own renderer program using c++. Everything was fine until I update the MacOS to 15.4. I keep receiving these errors: "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk/usr/include/c++/v1/cerrno:30:5 tried including <errno.h> but didn't find libc++'s <errno.h> header. This usually means that your header search paths are not configured properly. The header search paths should contain the C++ Standard Library headers before any C Standard Library, and you are probably using compiler flags that make that not be the case." It says I have problem with finding <errno.h> while including . After searching for solutions, I check the related xcode path, xcode-select -p shows : "/Applications/Xcode.app/Contents/Developer", seems fine. And I can actually see the errno.h file in the folder "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/errno.h" I tried to use CommandLineTool's SDKs by sudo xcode-select -s /Library/Developer/CommandLineTools but not working. The error Information says: This usually means that your header search paths are not configured properly.The header search paths should contain the C++ Standard Library headers before any C Standard Library, and you are probably using compiler flags that make that not be the case. Additionally, after running xcodebuild -showsdks, it shows two identical macosx sdks "macos 15.4". Could this be a hint? I also have tried reinstall xcode, not working. I've just created a simple project including and running std::cout << errno, it worked fine. So I tried to run it in my renderer program by cutting all the compile sources except "main.cpp", it still get the errors. What have changed? How do I set things right?

The current live version of my app is 1.1.0, and I intended to create a new submission version, 1.1.1. However, I accidentally entered it as 1.0.8. In App Store Connect, I couldn't find any button to delete or modify the 1.0.8 version, nor could I add another submission version. As a result, I tried to upload the build for version 1.0.8 via Xcode, but an even worse issue occurred—Xcode displayed an error: "A version 1.1.0 already exists, which is higher than 1.0.8, so the upload path is closed." I can't update my app now or later, what should I do to fix it?

I'm trying to track down why an external tool is claiming that Xcode isn't installed, despite it being installed (and used daily) in its default location. A visit to Xcode's Settings/Locations page shows a version selected for command-line tools, but underneath it says "No Xcode Selected." Why?