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
-
macOS 27.2: What’s New, Known Issues & Fixes
macOS 27.2 Golden Gate fixes Xcode crashes, StoreKit testing bugs, and removes a pasteboard privacy flag. Known issues with displays, notifications, and…
-
iOS 27.2: What’s New, Known Issues & Fixes
iOS 27.2 adds EU ATT expanded prompts, zero default UIView margins, and fixes StoreKit testing bugs. Known issues in Health, Nearby Interaction,…
-
Developer ID Sub-CA Expires Feb 1, 2027: How to Re-Sign Your Mac App
The old Developer ID Sub-CA expires February 1, 2027. Learn how to check your certificates, issue a G2 replacement, and re-sign your…
-
New App Store Creative Assets: How to Upload, Preview and Schedule
New App Store header and search assets, a preview tool, and an Asset Library in App Store Connect — what changed and…
-
iPhone Duo App Checklist: Rebuild, Screenshots and Submission
Xcode 27.1, new screenshot specs, and the April 2027 deadline: what iPhone Duo support requires from your app and how to submit…
-
Apple Developer License Agreement Oct 2026: Changes and How to Accept
The October 2026 Apple Developer Program License Agreement adds terms for Live Assistance API, HomeView widgets, CarPlay, and group purchases. Here’s what…
-
App Review 1.2 & 2.5.19: New NCII and Bait-and-Switch Rules
Apple tightened its App Review Guidelines around NCII, bait-and-switch apps, and illegal content. Here’s what changed and what your app needs in…
-
App Review Guidelines Oct 2026: 4 Changes to Check Before Submitting
Apple revised the App Review Guidelines in October 2026. See what changed in 1.2, 2.3.14, 2.5.19, 3.1.1(a) and 5, and what to…
-
Multiseat Purchasing for Subscriptions: How to Set It Up and Test It
Apple now lets businesses and schools buy subscription seats in volume. Here’s what multiseat purchasing means for your app and what to…
-
Xcode 27.2 RC: What’s New, Known Issues & Fixes
Xcode 27.2 RC adds JSON project format, Device Hub upgrades, Swift 6.4, and new SDKs. See known issues, workarounds, and whether to…
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.