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ransombb
Participating Frequently
February 26, 2018
Answered

Mac projector "can't be opened. You should move it to the trash."

  • February 26, 2018
  • 4 replies
  • 3335 views

I'm having problems with Mac projectors under High Sierra. If I create the .app and run it on the same machine, all is fine. However, if I move it to another machine I get the message '"app name" can't be opened. You should move it to the trash.'

I've read that this probably has something to do with High Sierra's Gatekeeper function but is there any solution besides totally disabling Gatekeeper via Terminal commands?

      This topic has been closed for replies.
      Correct answer Colin Holgate

      That's so weird that it works for you but not me. I tried in both Chrome and Safari as well. When I "Show Package Contents" and drill down, the Flash Player is what's broken. The SWF in package plays just fine.


      I think I have seen that before, and fixed the projector by replacing the Flash Player. I just tried a test with your projector, and it seemed to work. Go into show package contents of any Flash Player.app that works for you, and copy its MacOS/Flash Player Unix file into the projector's MacOS folder (replacing the suspect one). In my test I used Flash Player 26.0.0.137, because it was very close to the file size of your projector's Flash Player.

      4 replies

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      pftq
      Participant
      November 8, 2021

      I am having this same problem in 2021.  Transferring via thumb drive works, but uploading it to any server and redownloading to a MAC seems to corrupt the .app file (which on Windows is a folder).  Has there been any new solution? The command-line suggestion  by Aymeric did not work for me.

       

      If someone can upload a copy of the MAC-generated projector suggested by Colin, that'd be great as a temporary solution, but I'm not as comforable with that since it is confusing for users who may not be very tech savy.

      A
      Aymeric-
      Known Participant
      January 6, 2021

      Running into the same trouble. Fixed by this command line: xattr -cr AppName.app

      Unfortunately, each client have to do it. You should provide a simple bash file, so client don't have to open a terminal, which can be opened by a simple double click along your .app inside a zip 😉

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      ratio99
      Participating Frequently
      February 27, 2018

      I have the same problem, but it happens to me when sending it through some internet service (for example: wetransfer or dropbox). I don't have High Sierra, just Sierra and my client have Mavericks os.

      kglad
      Community Expert
      kgladCommunity Expert
      Community Expert
      February 26, 2018

      i'm not sure that's the problem.  you should see a different message, if it were: macOS Sierra: Open an app from an unidentified developer

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      ransombbAuthor
      Participating Frequently
      March 1, 2018

      If I Control-Click and choose Open, I get the same message.

      kglad
      Community Expert
      kgladCommunity Expert
      Community Expert
      March 1, 2018

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