Sierra Is Not Allowing Identified Developer App Downloads

This Warning Box Came Up When I Tried To Install A Program On My Mac Pro Today.

“MouseWorks Install” can’t be opened because it is from an unidentified developer.


Your security preferences allow installation of only apps from the Mac App Store and identified developers.

“MouseWorks Install” is on the disk image “MWInstall_3.0r1.dmg”. Safari downloaded this disk image today at 00:56 from download.cnet.com.


I went into System Preferences, Then Security & Privacy. Went To Allow Apps Downloaded From:


Saw "MouseWorks Install" was blocked from opening because it is not from an identified developer message!


Clicked the tab bar showing the words: Open Anyway sitiuated on the right of the previous message.


NOTHING HAPPENED!


Proceded to unlock to make changes, Rebooted,


NO LUCK...


Anyone Else Having This Problem.....

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Posted by
Phantom
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Sudo spctl --master-disable

Posted by
Stevie94
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Had the same problem last night. Even after selecting all sources and locking the change, it defaulted back to the original default setting. I opened preferences, made the change, locked it and kept it open on my desktop. I then opened the dmg file and and successfully installed my app. Odd, but it worked.

Posted by
VoiceofSF
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Could you elaborate on the change?


I tried what you suggested on using 3rd party software. Went into system preferences.


Clicked lock open, clicked open anyway, click locked , left system preferences open, tried to open dmg,


No Luck....Totaly Weird

Posted by
Phantom
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Sudo spctl --master-disable

Posted by
Stevie94
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Cheers - Worked Perfectly After Your Suggestion🙂

Posted by
Phantom
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Thanks a lot!


And please, Apple - keep this backdoor open for developers. Thx.

Posted by
vonstorm
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Thanks!

Posted by
fgilio
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This worked for me:


"

  1. In the Finder, locate the app you want to open.Don’t use Launchpad to do this. Launchpad doesn’t allow you to access the shortcut menu.
  2. Control-click the app icon, then choose Open from the shortcut menu.
  3. Click Open.The app is saved as an exception to your security settings, and you can open it in the future by double-clicking it just as you can any registered app.
Posted by
Blix
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App icon my iphone

Posted by
Somjitt Raiyai
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Same issue here. I can't open any downloads actually.

Posted by
kraor22
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I hit what looked like the same problem, and it turned out to be that downloads need to be https rather than http. That is not documented anywhere that I could find, but it showed up in the log. Changed to https and things are back to working.

Posted by
jdelmar
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Is there a way to get around having to run that code in the terminal. Is it possible to have the app automatically install if you use a developer certificate? Is this the only way to do it now?

Posted by
Eseye
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