[quote='880105022, hasii2021, /thread/818406?answerId=880105022#880105022, /profile/hasii2021'] I will continue to monitor this [/quote] Please update this thread if you learn more. I try to keep track of all the weird code signing errors and what causes them — one day I’ll write a technote based on that — and I’m super curious how you’re hitting this. Oh, actually, come to think of it, you can reproduce this, so it’d be worth filing a bug about it. So, if you have the time and inclination: Create a read/write disk image that’s big enough to hold your app. Copy the app on to it. Reproduce the error. And then immediately trigger a log snapshot: % sudo log collect --last 5m Adjust the --last parameter to a bigger value if code signing takes a really log time (-: And then a sysdiagnose log. Unmount the disk image. File a bug with that disk and the logs from steps 4 and 5. Once you’re done, reply here with the bug number and I’ll see what I can uncover. But I do understand if you’re not able to do this; you have