Asc Notarization

Handles the full macOS notarization workflow using xcodebuild and the asc CLI tool instead of xcrun notarytool. It walks you through archiving your app, exporting with Developer ID signing, zipping it up, and submitting to Apple's notary service. The preflight checks are genuinely helpful, especially the trust settings troubleshooting that catches a common certificate chain issue that breaks codesigning. Also covers stapling tickets for offline verification and notarizing DMG or PKG files if you need installer packaging. The asc tool uses Apple's v2 API with streaming uploads and automatic multipart handling for large files, which is cleaner than dealing with notarytool's quirks.

skills.sh installs: 1.1K
GitHub stars: 905
last updated: Jul 14, 2026

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Install

$ npx -y skills add rudrankriyam/asc-skills --skill asc-notarization --agent claude-code

Installs into .claude/skills of the current project.

Files

macOS Notarization

Use this skill when you need to notarize a macOS app for distribution outside the App Store.

Preconditions

Xcode installed and command line tools configured.
Auth is configured (asc auth login or ASC_* env vars).
A Developer ID Application certificate in the local keychain.
The app's Xcode project builds for macOS.

Preflight: Verify Signing Identity

Before archiving, confirm a valid Developer ID Application identity exists:

security find-identity -v -p codesigning | grep "Developer ID Application"

If no identity is found, create one at https://developer.apple.com/account/resources/certificates/add (the App Store Connect API does not support creating Developer ID certificates).

Inspect Trust Settings

If codesign or xcodebuild fails with "Invalid trust settings" or "errSecInternalComponent", the certificate may have custom trust overrides that break the chain:

# Check for custom trust settings
security dump-trust-settings 2>&1 | grep -A1 "Developer ID"

SKILL.md on GitHub

Details

Repository: github.com/rudrankriyam/asc-skills
First seen: May 16, 2026