How to Fix Signing Error in Xcode for Swift Projects

To fix a signing error in Xcode for Swift, ensure your Signing & Capabilities settings have a valid Team selected and that your provisioning profile and certificate are correctly configured. Also, try cleaning the build folder and restarting Xcode to refresh the signing state.

Why This Happens

Signing errors in Xcode occur because the app's code signing identity or provisioning profile is missing, invalid, or mismatched. This usually happens when Xcode cannot find a valid certificate or the provisioning profile does not include the device or app identifier.

swift

import UIKit

class ViewController: UIViewController {
  override func viewDidLoad() {
    super.viewDidLoad()
    // No signing setup here causes build error
  }
}

Output

error: No signing certificate "iOS Development" found: No valid signing identities (i.e. certificate and private key pair) matching the team ID were found.

The Fix

Open your project in Xcode, go to the Signing & Capabilities tab, and select your Apple Developer Team. Enable Automatically manage signing to let Xcode create and update provisioning profiles and certificates. If you prefer manual signing, ensure your provisioning profile matches your app's bundle identifier and includes your device.

Also, clean the build folder (Shift + Cmd + K) and restart Xcode to clear cached signing data.

swift

import UIKit

class ViewController: UIViewController {
  override func viewDidLoad() {
    super.viewDidLoad()
    print("App signed and running")
  }
}

Output

App signed and running

Prevention

To avoid signing errors in the future, always keep your Apple Developer certificates and provisioning profiles up to date. Use Automatically manage signing in Xcode when possible. Regularly check your Bundle Identifier matches your provisioning profile. Also, keep your Xcode updated to the latest stable version to benefit from improved signing tools.

Related Errors

• Provisioning profile expired: Renew your provisioning profile in the Apple Developer portal.
• Code signing identity not found: Reinstall your certificates or reset signing in Xcode.
• Device not included in provisioning profile: Add your device UDID to the profile and regenerate it.

Key Takeaways

Always select the correct Team and enable automatic signing in Xcode.

Ensure provisioning profiles and certificates are valid and match your app ID.

Clean the build folder and restart Xcode to refresh signing state.

Keep your Apple Developer account and certificates up to date.

Match your Bundle Identifier exactly with the provisioning profile.