# Dmg files vanish while AppWrapper is trying to package my apps **URL:** \ **Category:** Extras\ **Created:** [September 6, 2026, 12:00pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853 "2026-09-06T12:00:12Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Arnaud\_N](https://forum.xojo.com/user_avatar/forum.xojo.com/arnaud_n/32/21824_2.png) [@Arnaud\_N](https://forum.xojo.com/u/Arnaud_N)\ **Post date:** [September 6, 2026, 12:00pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/1 "2026-09-06T12:00:13Z")
Hi, I have an issue using AppWrapper. When I choose “Wrap, pack & notarize”, the process starts normally and DropDMG creates and manages the dmg file, but when it finishes that step, the dmg file just vanishes. Then, AppWrapper complains “No such file or directory” and stops. I’ve tried various combinations, changing the target folder, enabling/disabling options in AppWrapper, but the issue persists. I have no idea which process removes the dmg file; I’ve checked using fs\_usage and the Console, both don’t return anything interesting. I’m starting to assume it’s some kind of new MacOS “feature” which would mistakenly detect “suspicious” dmg files creation and “clean” them, but I don’t have any clue that this has been implemented in MacOS. Help would be welcome. ---
**Author:** ![Rick\_Araujo](https://forum.xojo.com/user_avatar/forum.xojo.com/rick_araujo/32/251_2.png) [@Rick\_Araujo](https://forum.xojo.com/u/Rick_Araujo)\ **Post date:** [September 6, 2026, 1:44pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/2 "2026-09-06T13:44:24Z")
I guess that your AppWrapper still the same, but have you updated DropDMG or your OS since the last time your “CI/CD” system was working? Or updated some processing script? Is this destination DMG place in an iCloud sync’d folder? ---
**Author:** ![Beatrix\_Willius](https://forum.xojo.com/user_avatar/forum.xojo.com/beatrix_willius/32/282_2.png) [@Beatrix\_Willius](https://forum.xojo.com/u/Beatrix_Willius)\ **Post date:** [September 6, 2026, 1:53pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/3 "2026-09-06T13:53:51Z")
> [@Arnaud\_N](#): > > I’m starting to assume it’s some kind of new MacOS “feature” Do you have something like Acronis installed? I had some problems when Acronis decided that DefaultFolder was a threat. I tried to install a new version of DefaultFolder and Acronis “vanished” the app. ---
**Author:** ![Arnaud\_N](https://forum.xojo.com/user_avatar/forum.xojo.com/arnaud_n/32/21824_2.png) [@Arnaud\_N](https://forum.xojo.com/u/Arnaud_N)\ **Post date:** [September 6, 2026, 4:21pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/4 "2026-09-06T16:21:23Z")
> [@Rick\_Araujo](#): > > have you updated DropDMG or your OS since the last time your “CI/CD” system was working? Yes for MacOS; I had MacOS 26 (latest release) installed before installing MacOS 27. > [@Rick\_Araujo](#): > > Or updated some processing script? No. > [@Rick\_Araujo](#): > > Is this destination DMG place in an iCloud sync’d folder? No, iCloud syncing is disabled since day 1. > [@Beatrix\_Willius](#): > > Do you have something like Acronis installed? I had some problems when Acronis decided that DefaultFolder was a threat. I tried to install a new version of DefaultFolder and Acronis “vanished” the app. That’s not my issue, sadly. Thanks for your answers. ---
**Author:** ![Beatrix\_Willius](https://forum.xojo.com/user_avatar/forum.xojo.com/beatrix_willius/32/282_2.png) [@Beatrix\_Willius](https://forum.xojo.com/u/Beatrix_Willius)\ **Post date:** [September 6, 2026, 5:24pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/5 "2026-09-06T17:24:33Z")
> [@Arnaud\_N](#): > > Thanks for your answers. Why do you use AppWrapper manually and not with a script? Have you done the needful like restarting the computer or using another computer? ---
**Author:** ![Rick\_Araujo](https://forum.xojo.com/user_avatar/forum.xojo.com/rick_araujo/32/251_2.png) [@Rick\_Araujo](https://forum.xojo.com/u/Rick_Araujo)\ **Post date:** [September 7, 2026, 2:29am UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/6 "2026-09-07T02:29:10Z")
> [@Arnaud\_N](#): > > Yes for MacOS; I had MacOS 26 (latest release) installed before installing MacOS 27. Maybe that broke your DropDMG or AppWrapper. If those apps use some tools like `hdiutil` that are now deprecated maybe something bad occur. Maybe you need to update those apps, if possible. Better not update the OS while not stable and with tools updated next time. ---
**Author:** ![Arnaud\_N](https://forum.xojo.com/user_avatar/forum.xojo.com/arnaud_n/32/21824_2.png) [@Arnaud\_N](https://forum.xojo.com/u/Arnaud_N)\ **Post date:** [September 7, 2026, 7:32am UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/7 "2026-09-07T07:32:54Z")
> [@Beatrix\_Willius](#): > > Why do you use AppWrapper manually and not with a script? Because I’ve not yet spent time on that. And I’m not really interested in going to the complicated way right now, especially since I doubt it would solve my actual problem. > [@Beatrix\_Willius](#): > > Have you done the needful like restarting the computer or using another computer? Yes for restarting the computer. As for trying on another one, dealing with the certificates is always a nightmare, so it would be time-consuming (it usually takes me around one week to set up the other computer I have). I think what would help most is understanding how a file can vanish without user interaction. > [@Rick\_Araujo](#): > > Maybe you need to update those apps, if possible. AppWrapper is up to date, but I’ll check about DropDMG. > [@Rick\_Araujo](#): > > Better not update the OS while not stable and with tools updated next time. Usually, I try an OS beta on just one computer and only if I find no severe bugs, I install it on the other computer some weeks later (when it’s in the user-beta cycle). I’ve done so this time, too. Normally, there are always workarounds for the eventual bugs at this stage. I’m wondering why AppWrapper, AppDMG or the OS would remove files without even telling it. Thanks for your answers. ---
**Author:** ![Thomas\_Roemert](https://forum.xojo.com/user_avatar/forum.xojo.com/thomas_roemert/32/827_2.png) [@Thomas\_Roemert](https://forum.xojo.com/u/Thomas_Roemert)\ **Post date:** [September 7, 2026, 8:28am UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/8 "2026-09-07T08:28:01Z")
> [@Arnaud\_N](#): > > I’m wondering why AppWrapper, AppDMG or the OS would remove files without even telling it. This us a known behaviour when Safari downloads DMGs: they were opened and deleted after ejection. Maybe macOS 27 did adapt this behaviour systemwide? ---
**Author:** ![Arnaud\_N](https://forum.xojo.com/user_avatar/forum.xojo.com/arnaud_n/32/21824_2.png) [@Arnaud\_N](https://forum.xojo.com/u/Arnaud_N)\ **Post date:** [September 7, 2026, 8:53am UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/9 "2026-09-07T08:53:25Z")
> [@Thomas\_Roemert](#): > > This us a known behaviour when Safari downloads DMGs: they were opened and deleted after ejection. Maybe macOS 27 did adapt this behaviour systemwide? Possibly a good guess. If true, that’s a terrible decision, because this setting cannot be turned off (my Safari→Settings→General→“Automatically open safe files” (I’m translating, not sure about the exact spelling) is already unchecked); deleting files that easily would be a huge mistake concerning how we can trust the OS. ---
**Author:** ![Beatrix\_Willius](https://forum.xojo.com/user_avatar/forum.xojo.com/beatrix_willius/32/282_2.png) [@Beatrix\_Willius](https://forum.xojo.com/u/Beatrix_Willius)\ **Post date:** [September 7, 2026, 9:38am UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/10 "2026-09-07T09:38:34Z")
> [@Thomas\_Roemert](#): > > Maybe macOS 27 did adapt this behaviour systemwide? This doesn’t make any sense because many developers need to make dmgs. @Arnaud_N : have you contacted Michael Tsai? ---
**Author:** ![Rick\_Araujo](https://forum.xojo.com/user_avatar/forum.xojo.com/rick_araujo/32/251_2.png) [@Rick\_Araujo](https://forum.xojo.com/u/Rick_Araujo)\ **Post date:** [September 7, 2026, 3:31pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/11 "2026-09-07T15:31:40Z")
Before contact, make sure being able to provide ways to reproduce the case. ---
**Author:** ![Jeff\_Tullin](https://forum.xojo.com/user_avatar/forum.xojo.com/jeff_tullin/32/693_2.png) [@Jeff\_Tullin](https://forum.xojo.com/u/Jeff_Tullin)\ **Post date:** [September 8, 2026, 6:24am UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/12 "2026-09-08T06:24:13Z")
I recall I had some issues a year or two ago - try changing the output location to somewhere other than ‘same as application’ ![image](https://forum.xojo.com/uploads/default/original/3X/4/d/4dbe55399765fa04bcb86102bada6cd567466353.jpeg) ---
**Author:** ![Arnaud\_N](https://forum.xojo.com/user_avatar/forum.xojo.com/arnaud_n/32/21824_2.png) [@Arnaud\_N](https://forum.xojo.com/u/Arnaud_N)\ **Post date:** [September 9, 2026, 7:01am UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/13 "2026-09-09T07:01:35Z")
> [@Beatrix\_Willius](#): > > @Arnaud_N: have you contacted Michael Tsai? Well, I don’t even know if DropDMG is to blame. Also, I’m not confident with writing a “professional” mail in English. So I’m looking at solutions using other ways. > [@Rick\_Araujo](#): > > Before contact, make sure being able to provide ways to reproduce the case. On my computer, it’s 100% reproducible, but since I don’t know why, I can’t provide the steps. > [@Jeff\_Tullin](#): > > I recall I had some issues a year or two ago - try changing the output location to somewhere other than ‘same as application’ Sadly still the same outcome. Thanks for your answers. ---
**Author:** ![Beatrix\_Willius](https://forum.xojo.com/user_avatar/forum.xojo.com/beatrix_willius/32/282_2.png) [@Beatrix\_Willius](https://forum.xojo.com/u/Beatrix_Willius)\ **Post date:** [September 9, 2026, 7:14am UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/14 "2026-09-09T07:14:13Z")
> [@Arnaud\_N](#): > > Well, I don’t even know if DropDMG is to blame. > Also, I’m not confident with writing a “professional” mail in English. Asking never hurts: “Hey, I have some wild problem. Is this DropDMG or am I being pranked by macOS”. I get emails in French and have no problems at all answering those. ---
**Author:** ![Sascha\_S](https://forum.xojo.com/user_avatar/forum.xojo.com/sascha_s/32/22328_2.png) [@Sascha\_S](https://forum.xojo.com/u/Sascha_S)\ **Post date:** [September 9, 2026, 1:51pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/15 "2026-09-09T13:51:47Z")
Maybe App Wrapper or DropDMG do not have **Full Disk Access**? macOS may allow the tool to write into a temporary path, but deny the permission needed to move it to the target folder, causing the temporary written file to get discarded upon exit. ---
**Author:** ![Arnaud\_N](https://forum.xojo.com/user_avatar/forum.xojo.com/arnaud_n/32/21824_2.png) [@Arnaud\_N](https://forum.xojo.com/u/Arnaud_N)\ **Post date:** [September 11, 2026, 7:18pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/16 "2026-09-11T19:18:03Z")
> [@Sascha\_S](#): > > Maybe App Wrapper or DropDMG do not have **Full Disk Access**? Good guess, but no, it doesn’t change anything. I’ve asked the author of DropDMG, who doesn’t believe the issue lies in his product. Now asked Sam and waiting for his answer… Why on earth am I the only one getting this? 🤷‍♂️ ---
**Author:** ![Jared\_Feder](https://forum.xojo.com/user_avatar/forum.xojo.com/jared_feder/32/3036_2.png) [@Jared\_Feder](https://forum.xojo.com/u/Jared_Feder)\ **Post date:** [September 11, 2026, 8:34pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/17 "2026-09-11T20:34:56Z")
Is App Wrapper quarantined for some reason? ---
**Author:** ![Rick\_Araujo](https://forum.xojo.com/user_avatar/forum.xojo.com/rick_araujo/32/251_2.png) [@Rick\_Araujo](https://forum.xojo.com/u/Rick_Araujo)\ **Post date:** [September 11, 2026, 10:10pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/18 "2026-09-11T22:10:11Z")
> [@Arnaud\_N](#): > > Why on earth am I the only one getting this? Because you are the only one with the right mix of mess able to generate the issue, OS + tools + paths + scripts + settings ---
**Author:** ![Arnaud\_N](https://forum.xojo.com/user_avatar/forum.xojo.com/arnaud_n/32/21824_2.png) [@Arnaud\_N](https://forum.xojo.com/u/Arnaud_N)\ **Post date:** [September 13, 2026, 3:15pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/19 "2026-09-13T15:15:43Z")
> [@Beatrix\_Willius](#): > > Have you done the needful like using another computer? I now tried on my MacBook Pro and the result is exactly the same 🤯 > [@Jared\_Feder](#): > > Is App Wrapper quarantined for some reason? > [@Jared\_Feder](#): > > Is App Wrapper quarantined for some reason? Doesn’t look like that. > [@Rick\_Araujo](#): > > Because you are the only one with the right mix of mess able to generate the issue, OS + tools + paths + scripts + settings Well, I was ironic. I can suspect my configuration is rare if I’m the only one having this trouble. I just can’t understand there are behaviours like this which just don’t leave any tracks, on supposedly tested applications and operating systems, and just stop one from going on. I asked Sam, the creator of AppWrapper, who couldn’t help me currently. Also, I tried to set the destination folder on an external disk. Not sure what to do next… ---
**Author:** ![Beatrix\_Willius](https://forum.xojo.com/user_avatar/forum.xojo.com/beatrix_willius/32/282_2.png) [@Beatrix\_Willius](https://forum.xojo.com/u/Beatrix_Willius)\ **Post date:** [September 13, 2026, 3:31pm UTC](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853/20 "2026-09-13T15:31:19Z")
> [@Arnaud\_N](#): > > I now tried on my MacBook Pro and the result is exactly the same 🤯 Now that is unexpected. How do you use AppWrapper? First the dmg and then notarisation I will assume. What happens if you disable notarisation? Just for testing. Do you have any build script which moves the app around? Have you tried to make another AppWrapper document? Or use a script to make the dmg and then do manual notarisation in AppWrapper. [Next page](https://forum.xojo.com/t/dmg-files-vanish-while-appwrapper-is-trying-to-package-my-apps/88853.md?page=2)