macOS Distribution & StoreKit

Critical Constraints

• ❌ DO NOT distribute without code signing → ✅ Always sign with Developer ID (direct) or Apple Distribution (App Store)
• ❌ DO NOT skip notarization for direct distribution → ✅ Required since macOS 10.15 for Gatekeeper
• ❌ DO NOT use Transaction.currentEntitlement(for:) → ✅ Use Transaction.currentEntitlements(for:) (plural, returns sequence)
• ❌ DO NOT forget PrivacyInfo.xcprivacy → ✅ Required for App Store submission

Distribution Decision Tree

App Store distribution?
├── YES → Apple Distribution certificate + sandbox + review
│   ├── Basic version (sandbox-safe features)
│   └── Pro features via IAP/subscription
└── Direct distribution?
    ├── Developer ID certificate + notarization
    ├── DMG or pkg installer
    └── Full system access (no sandbox required)

Dual strategy?
├── App Store: Basic/free version, sandbox-safe
└── Direct: Pro version, full Accessibility/CGEvent access

Code Signing & Notarization (Direct)

# Sign with Developer ID
codesign --deep --force --verify --verbose \
    --sign "Developer ID Application: Your Name (TEAMID)" \
    --options runtime \
    MyApp.app

# Create DMG
hdiutil create -volname "MyApp" -srcfolder MyApp.app \
    -ov -format UDZO MyApp.dmg

# Notarize
xcrun notarytool submit MyApp.dmg \
    --apple-id "you@email.com" \
    --team-id "TEAMID" \
    --password "app-specific-password" \
    --wait

# Staple (attach notarization ticket)
xcrun stapler staple MyApp.dmg

Sandboxing Entitlements (App Store)

<?xml version="1.0" encoding="UTF-8"?>
<plist version="1.0">
<dict>
    <key>com.apple.security.app-sandbox</key><true/>
    <key>com.apple.security.network.client</key><true/>
    <key>com.apple.security.files.user-selected.read-write</key><true/>
    <key>com.apple.developer.icloud-container-identifiers</key>
    <array><string>iCloud.com.company.app</string></array>
    <key>com.apple.security.application-groups</key>
    <array><string>group.com.company.app</string></array>
</dict>
</plist>

StoreKit — SubscriptionOfferView

import StoreKit

// Basic subscription offer
SubscriptionOfferView(productID: "com.app.pro.monthly")
    .prefersPromotionalIcon(true)

// With custom icon
SubscriptionOfferView(productID: "com.app.pro.monthly") {
    Image("pro_icon").resizable().frame(width: 40, height: 40)
}

// Show upgrade/downgrade based on customer status
SubscriptionOfferView(groupID: "com.app.subscriptions", visibleRelationship: .upgrade)

// Detail action
SubscriptionOfferView(productID: "com.app.pro.monthly")
    .subscriptionOfferViewDetailAction { isShowingStore = true }

StoreKit — Transaction Handling

// Check entitlements (new plural API)
for await result in Transaction.currentEntitlements(for: "com.app.pro") {
    if case .verified(let transaction) = result {
        let appTxID = transaction.appTransactionID
        if let offerPeriod = transaction.offerPeriod {
            // Handle offer period
        }
    }
}

// Track subscription status
.subscriptionStatusTask(for: "com.app.subscriptions") { statuses in
    if statuses.contains(where: { $0.state == .subscribed }) {
        customerStatus = .subscribed
    } else {
        customerStatus = .notSubscribed
    }
}

// AppTransaction — unique download identifier
let appTransaction = try await AppTransaction.shared
let transactionID = appTransaction.appTransactionID
let platform = appTransaction.originalPlatform  // .iOS, .macOS, .tvOS, .visionOS

StoreKit Testing in Xcode

1. File → New → File From Template → search "StoreKit Configuration File"
2. Define products in the .storekit file
3. Edit scheme → Options → StoreKit Configuration → select your file
4. Use Transaction Manager window to test purchase scenarios

Launch at Login

import ServiceManagement

func setLaunchAtLogin(_ enabled: Bool) {
    do {
        if enabled { try SMAppService.mainApp.register() }
        else { try SMAppService.mainApp.unregister() }
    } catch { print("Launch at login error: \(error)") }
}

func isLaunchAtLoginEnabled() -> Bool {
    SMAppService.mainApp.status == .enabled
}

Common Mistakes & Fixes

References

• Notarizing macOS software
• App Sandbox Design Guide
• StoreKit Documentation
• WWDC 2025: What's new in StoreKit