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Can't install software downloaded from the internet after installing messages beta

I get the following error message after installing the Messages Beta. I've since unistalled Messages and updated 10.7.4 hoping this would resolve the issue. It appears that some of the 10.8 security features(Gatekeeper)have been installed on my computer, but my system preferences application was not updated to allow me to change the Mac App store security settingsI do not have a current time machine backup to roll back the OS. I know better and am kicking myself for it .Any help or solution would be greatly appreciated.

User uploaded file

MacBook, Mac OS X (10.7.3), Dual Boot( Windows XP)

Posted on May 9, 2012 7:38 PM

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3 replies

Jun 2, 2012 11:08 PM in response to Damian Smith1

this is my issue

I have just tried installing an application on my mac running lion 10.7.4 and I get this pop up error:

“app name” is damaged and can’t be opened. You should move it to the Trash.

Clicking on the help icon takes me to this help message in mac help:



User uploaded file


The app has been modified or damaged


The app’s code does not match the original code that was signed. The app has been modfied, it may be broken, corrupted, or tampered with. If you feel the application is damaged or tampered with, you should delete it by dragging it to the trash.

Currently some applications and tools modify themselves after signing, such as AppleScript applications and some legacy tools. These types of applications cannot be opened unless Gatekeeper in the Security & Privacy preferences is set to “Anywhere.”

Open the General pane of Security & Privacy preferences

For more information about protecting your Mac from harmful software, read this help topic:

Protect your Mac from malware



When I go to system preferences there is no gatekeep option in security. However, if I search for gatekeeper in the system preferences search box, it appears and highlights the security section, when clicking on it however it still does not show any security options for gatekeeper.


thinking gatekeeper maybe running I tried to disable it in terminal and it returns : api object error

I downloaded this said app on a friends macbook running the save verson of lion and it loaded fine with just the "downloaded from the internet" warning but still able to open

christopher-cavenders-macbook:~ Ryno$ sudo spctl --status

assessments enabled

christopher-cavenders-macbook:~ Ryno$ sudo spctl --disable

error: invalid API object reference



I checked a friends mac and his came back disabled. How do fix this

Can't install software downloaded from the internet after installing messages beta

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