Hi everyone, I’m trying to get my iOS app running on a physical iPhone for real-device testing, but I’m blocked by a persistent code-signing issue in Xcode. The project compiles successfully, but when I select my physical iPhone as the destination, the build fails during the signing stage: errSecInternalComponent Command CodeSign failed with a nonzero exit code The app therefore never gets installed on the device. What I’ve checked: Xcode recognises my Apple Development certificate. security find-identity -v -p codesigning reports the identity as valid. The certificate is present in my login keychain. Keychain Access shows the certificate with its private key underneath it. My login keychain is unlocked. The keychain search list contains my login keychain and the System keychain. I checked both keychains for the corresponding private key. There are no custom trust settings. The particularly strange part is that signing fails outside Xcode too. I tested signing /usr/bin/true directly using the same Apple Development identity, and that also fails with: errSecInternalComponent I also attempted to repair the private key’s signing access/partition list, but received: The specified item is no longer valid. It may have been deleted from the keychain. Certificate situation Xcode → Manage Certificates currently shows two Apple Development certificates: One current certificate One older certificate marked “Not in Keychain” When I try to create a new Apple Development certificate, Xcode says: You already have a current Development certificate or a pending certificate request. This is the only Mac I have used with this Apple Developer account, so there isn’t another Mac from which I can recover or export the original private key. What should I do? I’m trying to understand the safest next step without making the certificate/keychain situation worse. Should I: Revoke the older certificate and create a new development certificate/private-key pair? Try to repair the existing signing identity/private key? Take another Apple-supported approach? The immediate goal is to get the app onto a physical iPhone so I can begin real-device testing, followed by QA/beta testing and App Store launch. Any advice on what is actually causing errSecInternalComponent in this situation, and the safest way to resolve it, would be greatly appreciated. I can provide additional Terminal output, screenshots, or Xcode logs if helpful. Thanks!