Demystify code signing and its importance in app development. Get help troubleshooting code signing issues and ensure your app is properly signed for distribution.

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Codesign login password
Xcode is prompting I enter a codesign login password when I am archiving my project. My password seems incorrect since there is no action after I enter my password and tap allow. what could be the problem?
Topic: Code Signing SubTopic: General
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Mar ’25
Regarding Qt application Code signing on MACOS
Hi support, Currently we are in a process of migrating our Qt application for MAC OS - ventura -v13.4. There is a specific feature in our application in which client tries to communicate with server (Socket communication) using Qt's QsslSocket Apis . To achieve this we are using self signed Ca certificate (.pem ) generated by using openSSl commands which uses IP address of the server. We are manually installing the certificate inside MAC OS - keychain and trusting it manually as well after installing . This is working fine in XCode environment in debug mode in MAC OS and client -server handshake is happening successfully. How ever after creating .dmg file (installer) the same handshake is not happening and we are getting error -Connection time out. Upon investigating this online, we got to know there has to be codesigning (both app bundle and the dmg file )along with notarization of the .dmg file in order to access keychain of MAC OS at runtime to access the self signed certificate installed. Now we have 2 queries here. Is code signing mandatory if we want to verify our app through keychain with .dmg file ? If yes, whats the best way to achieve this ? We have tried 2 options without any luck. option1 - Trying to build our specific target among 'ALL_BUILD' with signing key settings inside xcode where we are providing developer provisional certificate with apple team ID . After that we are trying to archive to generate dmg file which is code signed. We are failing here as the signed dmg is not getting installed due to other app related dependencies are missing . option 2- Code signing the dmg and the app bundle manually outside the environment of xcode with developer certificate and team ID. We are failing here as notarization needs to be done it seems to access keychain for certificate verification If Code signing is not mandatory then whats the best possible way to achieve this considering manually installation of certificate inside keychain with adding trust option is not working at the moment. Please specify the best solution if possible.
Topic: Code Signing SubTopic: General
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Mar ’25
Enterprise Vendor Id changing when it shouldn't
Hi All, Really weird one here... I have two bundle ids with the same reverse dns name... com.company.app1 com.company.app2 app1 was installed on the device a year ago. app2 was also installed on the device a year ago but I released a new updated version and pushed it to the device via Microsoft InTunes. A year ago the vendor Id's matched as the bundle id's were on the same domain of com.company. Now for some reason the new build of app2 or any new app I build isn't being recognised as on the same domain as app1 even though the bundle id should make it so and so the Vendor Id's do not match and it is causing me major problems as I rely on the Vendor Id to exchange data between the apps on a certain device. In an enterprise environment, does anyone know of any other reason or things that could affect the Vendor Id? According to Apple docs, it seems that only the bundle name affects the vendor id but it isn't following those rules in this instance.
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Jun ’25
Binary Signing Error
I will post my app xyz.app uses XY swift package this swift package is a wrapper for XYSDK.xcframework XYSDK.xcframework written in c++ and app running on arm64 macos and iphones succesfully. I got this error when i want to distribute it. Currently i sign .framework for ios with Apple Distribution Certificate and same certificate for macos framework there is no other signing step for swift package or xcframework other than that when i want to archive it validates succesfully. Exporting step shows that app has signed, has provisining profile. but .framework is only signed has no provisioning profile. Also one point i see: i have one target named xyz and its Frameworks, Lİbraries and Embedded Context has only XY package but Embed part has no option like embed and sign etc. Blank. I need more info about what am i doing wrong in which step ? I am stuck and can not move any further like weeks Error Detail: Invalid Signature. The binary with bundle identifier XYSDK at path “xyz.app/Frameworks/XYSDK.framework” contains an invalid signature. Make sure you have signed your application with a distribution certificate, not an ad hoc certificate or a development certificate. Verify that the code signing settings in Xcode are correct at the target level (which override any values at the project level). Additionally, make sure the bundle you are uploading was built using a Release target in Xcode, not a Simulator target. If you are certain your code signing settings are correct, choose “Clean All” in Xcode, delete the “build” directory in the Finder, and rebuild your release target. For more information, please consult https://developer.apple.com/support/code-signing. (90035)
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May ’25
Command CodeSign failed with a nonzero exit code - OpenGL
Hey, So i am trying to setup OpenGL on my mac. Specs : M2 Pro, 15.5 (24F74) Now i have setup the entire project properly as far as i know. GLFW, GLAD and the OpenGL framework. the build libraries are also reference and everything. I have also included the glad.c file in the folder. i have also kept it to run locally in signing tab. its still giving me Command CodeSign failed with a nonzero exit code All the ss are provided
Topic: Code Signing SubTopic: General
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Jul ’25
Investigating Third-Party IDE Code-Signing Problems
I regularly see questions from folks who’ve run into code-signing problems with their third-party IDE. There’s a limit to how much I can help you with such problems. This post explains a simple test you can run to determine what side of that limit you’re on. If you have any questions or comments, please put them in a new thread here on DevForums. Put it in Code Signing > General topic area and apply whatever tags make sense for your specific situation. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com" Investigating Third-Party IDE Code-Signing Problems DTS doesn’t support third-party tools. If you’re using third-party tooling and encounter a code-signing problem, run this test to determine whether you should seek help from Apple or from your tool’s vendor. IMPORTANT Some third-party tools create Xcode projects that you then build and run in Xcode. While that approach is understandable, it’s not something that DTS supports. So, the steps below make sense even if you’re already using Xcode. To check that code-signing is working in general: Launch Xcode. In Xcode > Settings > Accounts, make sure you’re signed in with your developer account. Create a new project from the app project template for your target platform. For example, if you’re targeting iOS, use the iOS > App project template. When creating the project: Select the appropriate team in the Team popup. Choose a bundle ID that’s not the same as your main app’s bundle ID. Choose whatever language and interface you want. Your language and interface choices are irrelevant to code signing. Choose None for your testing system and storage model. This simplifies your project setup. In the Signing & Capabilities editor, make sure that: "Automatically manage signing” is checked. The Team popup and Bundle Identifier fields match the value you chose in the previous step. Select a simulator as the run destination. Choose Product > Build. This should always work because the simulator doesn’t use code signing [1]. However, doing this step is important because it confirms that your project is working general. Select your target device as the run destination. Choose Product > Build. Then Product > Run. If you continue to have problems, that’s something that Apple folks can help you with. If this works, there’s a second diagnostic test: Repeat steps 1 through 10 above, except this time, in step 4, choose a bundle ID that is the same as your main app’s bundle ID. If this works then your issue is not on the Apple side of the fence, and you should escalate it via the support channel for the third-party tools you’re using. On the other hand, if this fails, that’s something we can help you with. I recommend that you first try to fix the issue yourself. For links to relevant resources, see Code Signing Resources. You should also search the forums, because we’ve helped a lot of folks with a lot of code-signing issues over the years. If you’re unable to resolve the issue yourself, feel free to start a thread here in the forums. Put it in Code Signing > General topic area and apply whatever tags make sense for your specific situation.
Topic: Code Signing SubTopic: General
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Aug ’25
Apple ID, Dev Prog Team ID, and provisioning profiles
I was working in Xcode with a free personal Team ID. I upgraded to the Dev Program and now have a paid Team ID. I used the same Apple ID for both. The paid Team ID shows up in developer.apple.com as associated with my Apple ID. However, Xcode is not using the paid Team ID in signing, it's stuck on my old personal Team ID. In addition, I'm getting provisioning errors (0xe8008015) when we try to run our app on an iPhone. Anyone have any thoughts? I've scoured the forums and ChatGPT'd, Cursor'd, etc...all of the suggested fixes do not work. This almost seems like Apple needs to make my Apple ID associated with the paid Team ID or something, to start. Thanks all.
Topic: Code Signing SubTopic: General
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Aug ’25
Inquiry Regarding Gatekeeper Behavior During Application Upgrade
Can you please help us with the scenario below, including details and Apple’s recommendations? I've already read through the Notarization and Gatekeeper documentation. The installed version of our application is 1.2.3, located in /Applications/XYZSecurity.app. We created an upgrade package for version 1.2.4. As part of the pre-install script in the 1.2.4 installer, we explicitly deleted some obsolete .dylib files from /Applications/XYZSecurity.app/Contents/Frameworks and some executable files from /Applications/XYZSecurity.app/Contents/MacOS that were no longer needed in version 1.2.4. The installation of version 1.2.4 completed successfully, but we see the below error logs in installer.log: PackageKit: Failed to unlinkat file reference /Applications/XYZSecurity.app/Contents/Frameworks/libhelper.dylib PackageKit: Failed to unlinkat file reference /Applications/XYZSecurity.app/Contents/MacOS/helper-tool Our Key Questions: Is it the right practice to remove obsolete files in the pre-install script during an upgrade? Is this approach recommended by Apple? Can this cause any issues with Apple Gatekeeper? Is there a possibility of my application getting blocked by Gatekeeper as a result?
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Sep ’25
compile code required signing from unexisting user
Hi, This is my first time developing for iPhone, and I believe I have encountered an unusual edge case related to user management. Background: I work at a very small company currently in the proof-of-concept stage of building an iOS app. We created an Apple account under the company name: Green Vibe, using our corporate email. Initially, I developed the app under the free account on my local iPhone, and everything worked smoothly. When NFC functionality became necessary, we upgraded to a paid Apple Developer account. At that point, I enrolled as a developer under my personal name (Or Itach) while logged in with the Green Vibe Apple account. I want to emphasize that only one Apple account was created — the Green Vibe account. The Issue: When attempting to add NFC, I was able to create the required certificate under the name Or Itach. However, when compiling the project, Xcode prompts me to enter the login password for the user Or Itach. This is problematic because there is no Apple ID associated with that name — only the Apple Developer enrollment under Green Vibe exists. Request: Could you please advise on the proper way to resolve this situation? Specifically: Should the developer enrollment be tied directly to the Green Vibe account rather than to an individual name? How can I correctly configure the account so that Xcode no longer requires a nonexistent Apple ID password? Thank you very much for your support and clarification.
Topic: Code Signing SubTopic: General
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Sep ’25
WatchOS Companion app on VPP Crashing on Launch
Hello, I sent this in as a feedback several weeks ago about watchOS 26.2 beta 2 but since the issue is still active now that watchOS 26.2 is in production I'm reposting here for the community. I would also like to submit a DTS about this issue but honestly don't know the best way to go about it and would appreciate advice about that. There seems to be an issue with VPP distribution for our app on watchOS 26.2. When our watchOS companion app is launched after being installed through VPP to a supervised iPhone, it encounters a dyld error before main() or any application code is even called. The same app launches correctly in every other circumstance we could imagine and test: – Installed through VPP on supervised devices running watchOS 26.1. – Installed from the app store (using an apple id) on a supervised iPhone and paired watch running iOS 26.2 / watchOS 26.2. – Installed through Testflight on a supervised iPhone and paired watch running iOS 26.2 / watchOS 26.2. – Installed through the app store on unsupervised devices running watchOS 26.1 and 26.2. This strongly appears to be a VPP signing issue because we even did the following experiment: Install iPhone and Watch apps through the App Store on a supervised device pair running public iOS 26.2 beta 2 / watchOS 26.2 beta 2. Verify that both apps launch successfully. Use an MDM command to install from VPP over the existing installations Verify that the watch app fails to launch (the iOS app is unaffected) My feedback included some crash logs which I won't be reposting publicly here. Any feedback or ideas appreciated.
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