| name | macos-build |
| description | Build a native macOS app using xcodebuild from the command line. Use this skill whenever the user asks to build, compile, or check if their macOS project compiles successfully. Also use it when the user asks to fix build errors, verify changes compile, or run a debug build. Trigger on phrases like "build the app", "does it compile", "run xcodebuild", "fix build errors", or even just "build".
|
Build macOS App
Build any native macOS Xcode project from the command line using xcodebuild.
Finding the Project
Before building, locate the Xcode project or workspace:
find . -maxdepth 2 -name "*.xcodeproj" -o -name "*.xcworkspace" | head -5
Then list available schemes:
xcodebuild -list -project "YourApp.xcodeproj" 2>/dev/null | grep -A 20 "Schemes:"
Build Command
Use this command template, replacing the project path and scheme:
DEVELOPER_DIR=/Applications/Xcode.app/Contents/Developer xcodebuild build \
-project "YourApp.xcodeproj" \
-scheme "YourApp" \
-configuration Debug \
-destination "platform=macOS" \
2>&1 | grep -E "(BUILD SUCCEEDED|BUILD FAILED|error:)" | head -20
For workspaces (projects with SPM dependencies or CocoaPods):
DEVELOPER_DIR=/Applications/Xcode.app/Contents/Developer xcodebuild build \
-workspace "YourApp.xcworkspace" \
-scheme "YourApp" \
-configuration Debug \
-destination "platform=macOS" \
2>&1 | grep -E "(BUILD SUCCEEDED|BUILD FAILED|error:)" | head -20
Interpreting Results
- BUILD SUCCEEDED -- the build passed, report success to the user.
- BUILD FAILED with
error: lines -- read each error, identify the source file and line, and help the user fix them. After fixing, re-run the build to verify.
- If the output is empty or unclear, re-run without the grep filter to get full output for diagnosis.
When to Build
- After making code changes, if the user asks to verify they compile
- When the user explicitly says "build", "compile", or "check if it builds"
- After fixing build errors, to confirm the fix worked
Xcode Beta Toolchains
If the project targets a beta SDK (e.g., macOS 26 Tahoe), you may need to point to the beta Xcode:
DEVELOPER_DIR=/Applications/Xcode-beta.app/Contents/Developer xcodebuild build ...
Check which Xcode is available:
ls /Applications/ | grep -i xcode
Common Build Failures
| Error | Fix |
|---|
no such module 'Sparkle' | SPM dependency not resolved. Try xcodebuild -resolvePackageDependencies first |
no signing identity found | Set CODE_SIGN_IDENTITY="" and CODE_SIGNING_ALLOWED=NO for command-line builds |
SDK "macosx" cannot be located | Wrong DEVELOPER_DIR. Check Xcode installation path |
scheme not found | Run xcodebuild -list to see available schemes |
