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Question: file is damaged and can’t be opened. You should move it to the Trash.

All the files that I download from the internet return the error "*****" is damaged and can’t be opened. You should move it to the Trash. when I try to open them. This issue started today.

To clarify the problem only applies to downloaded files like apps, zip and dmg.

I'm able to open all the other files and run apps.

To solve the issue I reinstalled Catalina and disable Gatekeeper without any success.

Any Ideas on how to resolve this issue would be greatly appreciated.

Mac (Retina 5K, 27-inch, Late 2015) running Catalina 10..15.1


Thanks in advance,

WFG


iMac 27", macOS 10.15

Posted on Nov 26, 2019 5:05 PM

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Question marked as Apple recommended
Answer:
Answer:

Could not find a Fix, for the third time in a month I had to erase may machine and then do a restore. The difference is that this time I did a restore using the Time Machine backup from from the day before applying the 10.15.2 update, in previous 2 incidents I did a combination fresh Mac OS 10.15 install, manually transferring my files and migration assistance to move over apps from Time Machine.


Everything seems to be working fine, not sure how to proceed with the 10.15.2 update, I do not want to find my self in the same situation.

Posted on Dec 18, 2019 7:51 PM

Question marked as Helpful

Jan 3, 2020 4:56 PM in response to wgrahame In response to wgrahame

I recently updated my 2013 27" iMac to macOS 10.15.2 Catalina, and found that I needed to update applications such as BackBlaze and TechTool Pro on my system. Downloaded the .dmg files and when I tried to open them, got the now infamous error message: "filename.dmg" is damaged and can't be opened. You should move it to the Trash."

To test if this was true, I returned to my MacBook Pro running macOS 10.14 Mojave, downloaded the BackBlaze installer dmg file and successfully opened it on that system. Once the installer disk image was mounted on my desktop, I copied the installer App from that disk image and pasted it into a new folder in my iCloud Drive (in use on both the MBPro and on the iMac running Catalina). Back on the iMac, running Catalina, I used Command + Open to open the installer Application for Back Blaze, then answered the system security questions that yes, in fact, I did want to open that application. The installer application ran successfully in Catalina. Repeated the process for the TechTool Pro installer -- an Installer Package file -- copying it to the iCloud Drive folder. Repeated the Command + Open technique for the TechTool Pro Installer, but this time it did not work -- got the same "file is damaged" message. Have not found a work-around for this... yet. Hope this helps.

Jan 3, 2020 4:56 PM

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Nov 26, 2019 5:45 PM in response to wgrahame In response to wgrahame

How odd that this issue would persist after reinstalling Catalina. What browser do you use? If not Safari, perhaps the browser has an issue with Catalina. I would check for updates within the browser, and if that doesn’t help, try Safari or another browser. Let me know if you still have trouble.

Nov 26, 2019 5:45 PM

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Nov 27, 2019 1:23 PM in response to wgrahame In response to wgrahame

What happens when you try to download these files on other devices in your home? Have you tried to download them on a network outside of your home? If you can share some links for these files, I can see what happens when I try on my Mac.

Nov 27, 2019 1:23 PM

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Nov 27, 2019 1:43 PM in response to wgrahame In response to wgrahame

To tell if the problem is limited to your user account or is system wide log into another user account on your Mac, download a file and try to open it. If it opens then we know the problem is limited to your account.


Back in your account boot into Safe Mode (Use Safe Mode to isolate issues with your Mac)  and repeat the download and open test. Reboot normally try opening the files again.\

NOTE: Safe Mode boot can take up to 10 minutes as it's doing some system cache cleaning, volume verifying and directory repairing. 


Nov 27, 2019 1:43 PM

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Dec 13, 2019 6:28 AM in response to Old Toad In response to Old Toad

Thanks for the reply, I ended doing a clean installed of the system and apps, then I moved my files manually.


It worked perfectly and my Mac was running like new until yesterday that I did the Mac OS 10.15.2 update, now all the files on all the accounts in the computer are "*****"is damaged and can’t be opened. You should move it to the Trash.


This is extremely frustrating, this is the second time I run into this issue since installing Catalina, never had this issue with previous Mac OS versions.

Doing a search of the community I can see that many user have the same problem, but I can find a solution that revolves the issue without having to do a clean install again.


Dec 13, 2019 6:28 AM

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Dec 13, 2019 6:42 AM in response to wgrahame In response to wgrahame

wgrahame Said:

file is damaged and can’t be opened. You should move it to the Trash.

———-


Scan your Mac for Malware: 

Use MalwareBytes for Mac --- This is software that searches for malware/adware. Such software make your make act in mischievous ways(Technically). So, scan with it and then remove what is found. Once removed, uninstall MalwareBytes for Mac. Then restart the Mac.


Downloads:

  1. Malwarebytes Anti-Malware for Mac
  2. Malwarebytes uninstaller

Dec 13, 2019 6:42 AM

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Dec 14, 2019 10:39 AM in response to wgrahame In response to wgrahame

wgrahame Said:

Thanks for the sugestión, but I am unable to install the app, anything I download gives the error file is damaged and can’t be opened. You should move it to the Trash.

———-


You are Welcome.


Create a Administrator-Type User.

Name it “test” and use the password “test” Try this in the new user. Delete the “test“ administrator user after all of this.


To Create the New Administrator User:

Go to:

  1. System Preferences
  2. Users and Groups
  3. Unlock with Password (bottom-left of window)
  4. Click the “+” button
  5. Create a new user named “test”. Use:
  • administrator-type
  • test” for the user name
  • test” for the password


Login as “test” and see if this installs. If it install and work, then it’s something in your current user. If it doesn’t work, if it doesn’t the. it’s the application itself, most certainly. Just delete “test


Whatever the application is, contact the developer for a new download — either it is incomparable with your Mac, or it is a corrupt download.

Dec 14, 2019 10:39 AM

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Dec 14, 2019 2:27 PM in response to TheLittles In response to TheLittles

Thanks for the suggestion, but the issue is not related to one specific app, it's affecting all my my files on the computer, including documents and download, in all user accounts. The installed applications open and work fine.


It is extremely frustrating dealing with this issue, in my thirty years that I have been using Apple I have never encounter anything like this. As I mention before this the second time this has happen in less than a month and the only solution that fix the issue the first time was doing a clean install, I am not too keen on repeating the process, it was tedious and long.


Something is seriously wrong with Catalina and form what I can tell Apple is not paying attention to the problem or it does not care.


Bye the way tried the Administrator user and it does not fix the problem.



Dec 14, 2019 2:27 PM

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Question marked as Apple recommended

Dec 18, 2019 7:51 PM in response to wgrahame In response to wgrahame

Could not find a Fix, for the third time in a month I had to erase may machine and then do a restore. The difference is that this time I did a restore using the Time Machine backup from from the day before applying the 10.15.2 update, in previous 2 incidents I did a combination fresh Mac OS 10.15 install, manually transferring my files and migration assistance to move over apps from Time Machine.


Everything seems to be working fine, not sure how to proceed with the 10.15.2 update, I do not want to find my self in the same situation.

Dec 18, 2019 7:51 PM

Reply Helpful
Question marked as Helpful

Jan 3, 2020 4:56 PM in response to wgrahame In response to wgrahame

I recently updated my 2013 27" iMac to macOS 10.15.2 Catalina, and found that I needed to update applications such as BackBlaze and TechTool Pro on my system. Downloaded the .dmg files and when I tried to open them, got the now infamous error message: "filename.dmg" is damaged and can't be opened. You should move it to the Trash."

To test if this was true, I returned to my MacBook Pro running macOS 10.14 Mojave, downloaded the BackBlaze installer dmg file and successfully opened it on that system. Once the installer disk image was mounted on my desktop, I copied the installer App from that disk image and pasted it into a new folder in my iCloud Drive (in use on both the MBPro and on the iMac running Catalina). Back on the iMac, running Catalina, I used Command + Open to open the installer Application for Back Blaze, then answered the system security questions that yes, in fact, I did want to open that application. The installer application ran successfully in Catalina. Repeated the process for the TechTool Pro installer -- an Installer Package file -- copying it to the iCloud Drive folder. Repeated the Command + Open technique for the TechTool Pro Installer, but this time it did not work -- got the same "file is damaged" message. Have not found a work-around for this... yet. Hope this helps.

Jan 3, 2020 4:56 PM

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User profile for user: wgrahame

Question: file is damaged and can’t be opened. You should move it to the Trash.