Xcode · Swift · iOS · macOS
Fix Xcode errors, Swift bugs & iOS problems, fast.
Step-by-step fixes for build errors, code signing, SwiftUI, App Store Connect and the bugs that come with every new iOS and macOS release.
Browse by topic
For developers
Xcode Errors
Build failures, code signing and provisioning, simulator problems, archive and upload errors.
For developers
Swift & SwiftUI
Swift and SwiftUI explained with working code: concurrency, data flow, navigation, compiler errors.
For developers
App Store & TestFlight
App Store Connect, TestFlight builds, App Review rejections and StoreKit issues.
For iPhone & iPad
iOS Fixes
Battery drain, Wi-Fi, Bluetooth, storage and app problems after iOS updates.
For Mac
macOS Fixes
macOS update problems, Finder, external drives, storage and apps that won’t open.
What’s new
Developer Updates
New Xcode, SDK and OS releases: what changed, known issues and what to update.
Latest guides
-
Fix: SFSafariApplication.dispatchMessage Not Delivering Messages to Safari Web Extension Background Script
Learn why SFSafariApplication.dispatchMessage silently fails and how to implement the required SFSafariExtensionHandling protocol to enable app-to-extension messaging.
-
How to Install Xcode Command Line Tools on a Mac
Install Xcode Command Line Tools with xcode-select –install, verify the active developer directory, and fix the “not currently available” installer error.
-
Fix: @State Change Not Triggering View Re-render in SwiftUI
Learn why @State changes sometimes skip parent view re-renders in SwiftUI. Understand dependency tracking vs ownership and how Binding affects updates.
-
Fix: Building for iOS Simulator, but Linking in arm64 Object File
Fix the Xcode error building for iOS Simulator, but linking in an object file built for iOS arm64. Exclude arm64 correctly or…
-
Fix: SwiftUI List Not Updating When Appending to an Array in a Class
Appending to an array inside a class doesn’t refresh SwiftUI because the object isn’t observable. Fix it with @Observable or ObservableObject and…
-
Fix: Transport Security Has Blocked a Cleartext HTTP Resource Load
Add the right NSAppTransportSecurity keys to Info.plist so iOS stops blocking your http:// request, with per-domain exceptions and a Debug-only setup.
-
Fix: UIActivityViewController Share Sheet Icons Oversized and Overlapping on iOS 26
Fix oversized, overlapping service icons in UIActivityViewController on iOS 26 by correcting SceneDelegate window initialization.
-
How to Install CocoaPods on a Mac (and Fix gem Errors)
Install CocoaPods on macOS without sudo gem failures: Homebrew or a user gem install, the right Ruby, then pod init, pod install…
-
Fix: Timer.TimerPublisher Won’t Restart After connect().cancel()
Timer.TimerPublisher keeps firing after you cancel the sink, and connect() won’t restart it. Fix the connection lifetime with AnyCancellable and autoconnect.
-
Fix: xcrun: error: invalid active developer path After macOS Update
Git stopped working after a macOS update with an xcrun invalid active developer path error? Reinstall Command Line Tools, reset the path,…
Built from real problems
Every guide starts from an actual error message, release note or issue developers and users are hitting right now.
Fix first, theory second
A quick answer at the top, then the fixes in order of what’s most likely to work, with code you can copy.
Sources you can check
We link Apple’s release notes and the original discussions, and update guides when new versions change the answer.