I have been trying to package a FileMaker 18 runtime app* for Mac distribution for - oh - a year and a half on and off (the Windows version was packaged in an afternoon). I succeeded - or thought I had - until I updated to Tahoe. Now my packaging process does everything it did formerly (creates the DMG, etc.), but when opened, fails to see/load a third-party plugin (BaseElements.fmplugin). Does anyone know why this should be? I have attached 4 of my build files in the hope that someone can point me in the right direction. Thanks in advance for any advice you may provide. Regards, L *Claris deprecated the runtime feature years ago, but it still runs and is useful for proof of concept. P.S. A contributor to an earlier query kindly suggested I go down the zip file or pkg installer route, rather than the DMG route. I tried doing as much but found both as susceptible to Mac spaghetti signage. build_all.txt repair_and_sign.txt build_dmg.txt notarize_dmg.txt

One of our apps (built with Xcode 26.1.1 and distributed via TestFlight) crashes upon launch on iOS 17 with Exception Type: EXC_BAD_ACCESS (SIGKILL) and Termination Reason: CODESIGNING 2 Invalid Page. I have never seen this before. Any pointers? On iOS 18 & 26 this does not happen btw.

When I create an archive file and attempt to upload the app using the "Distribute App" button, the upload fails with the error "Automatic signing cannot update bundle identifier...". (The detailed message is below.) When creating an archive file in Xcode, I unchecked "Automatically Manage Signing" and proceeded with the archive. The message says "Font Enumeration," but other apps with the same option enabled upload successfully. Therefore, I believe the "Font Enumeration" option is not the issue. I tried creating a new provisioning file, but it still doesn't work. I deleted all DerivedData files from my Mac storage, restarted Xcode, and tried again, but it still doesn't work. This keeps happening only for certain targets (specific apps) in Xcode. Does anyone know how to fix this? Xcode is the latest version. Message: Automatic signing cannot update bundle identifier "com.xxxxxx.xxxxxx". Automatic signing cannot update your registered bundle identifier to enable Font Enumeration. Update your bundle identifier on https://developer.apple.com/account and then try again.

My team is distributing a cross-platform app outside the Mac App Store via ZIP file. The app works perfectly on Windows, but on macOS, while the ZIP downloads and extracts without issue, the app refuses to open. Users see either the app appear in the dock then immediately disappear or a Gatekeeper prompt saying the developer cannot be verified. We suspect the root cause is related to code signing and/or notarization, but we're not entirely sure where the breakdown is occurring. We have a few questions as we work through this. For ZIP-based distribution outside the Mac App Store, is both a Developer ID certificate and Apple notarization required on current macOS versions? We've also seen references to using ditto instead of Finder's built-in Compress option when packaging the ZIP. Is that necessary to properly preserve the app bundle structure and extended attributes? Any guidance on where this process might be going wrong would be hugely appreciated. Thanks!

I have an app for iOS already on the AppStore and I'm trying to add a macOS version of it. The AppID prefix for this app is different than my Team ID. This mismatch was always fine for submitting my iOS app. However for some reason, the macOS version gets rejected when I upload it. It tells me the AppID prefix must match my Team ID. I do not control my TeamID and I do not control my AppID prefix, they are both given to me by Apple. Yet the error message tells me they must match. How do I get past this? Here is the error message: Validation failed Invalid code signing entitlements. Your application bundle's signature contains code signing entitlements that aren't supported on macOS. Specifically, the "APPID_PREFIX.MY_BUNDLE_ID" value for the com.apple.application-identifier key in "MY_PACKAGE" isn't supported. This value should be a string that starts with your Team ID, followed by a dot ('"), followed by the bundle ID. (ID: 930b77ae-099f-4798-a14a-2803f2a9be9e) Thanks in advance for any pointer.

Sharing a solution for a problem that took me a while to figure out. Problem: During development of a macOS 26 app that uses ScreenCaptureKit, the screen capture permissions were being reset after every build. Each time I compiled and ran the app from Xcode, I had to re-authorize screen capture in System Settings. CGPreflightScreenCaptureAccess() would return false even though I'd just granted permission minutes ago. Root cause: I was using ad-hoc code signing during development. macOS ties screen capture permissions to the app's code signing identity. With ad-hoc signing, the identity changes on every build, so the system treats each build as a "new" app. Solution: Switch to an Apple Development certificate for debug builds. In Xcode: Build Settings → Code Signing Identity → Debug → set to "Apple Development" Make sure your development team is selected After this change, the signing identity remains stable across builds, and screen capture permissions persist. This might be related to the broader issue discussed in this forum about ScreenCapture permissions disappearing — if other developers are seeing permissions vanish, it's worth checking whether the code signing identity is changing between sessions.

We've noticed, that size of our ipa started to vary from time to time. We've found that all the difference was in the LC_CODE_SIGNATURE command under the _LINKEDIT segment of binary. The main reason of that change was the different number of hash slots due to different value of page size: 4096 on macOS SEQUOIA and 16384 on macOS TAHOE. So the size of the final binary was dependent on the machine, it was produced on. I didn't find out any information on why the default page size changed on TAHOE. Apple’s codesign supports a --pagesize argument. For regular builds that setting can be passed via OTHER_CODE_SIGN_FLAGS=--pagesize 16384. But it seems that xcodebuild export ...` completely ignores it: i've tried to pass invalid size (not the power of two), and the export still succeded. I've also managed to get xcodebuild logs via log stream --style compact --predicate 'process == "xcodebuild" OR process == "codesign"' --level trace They have no occurrences of --pagesize: 2026-03-24 13:43:27.236 Df xcodebuild[93993:a08c53] [IDEDistributionPipeline:verbose] invoking codesign: <NSConcreteTask: 0x8a1b21bd0; launchPath='/usr/bin/codesign', arguments='( "-f", "-s", 8C38C4A2CB0388A3DB6BAEFE438F20E044EE6CB2, "--entitlements", "/var/folders/w_/5t00sclx2vlcm4_fvly7wvh00000gn/T/XcodeDistPipeline.~~~T3Dcdf/entitlements~~~c2srXx", "--preserve-metadata=identifier,flags,runtime,launch-constraints,library-constraints", "--generate-entitlement-der", "--strip-disallowed-xattrs", "-vvv", "/var/folders/w_/5t00sclx2vlcm4_fvly7wvh00000gn/T/XcodeDistPipeline.~~~T3Dcdf/Root/Payload/App.app/Frameworks/FLEXWrapper.framework" )'> So here I have some questions: How is the default page size selected? Why the default page size may change between SEQUOIA and TAHOE? How to provide page size to xcodebuild's export or it's a bug that it doesn't look at the value of OTHER_CODE_SIGN_FLAGS?