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I am trying to install an application from its .iso image file. I can successfully mount the .iso file, but when I click the installer, nothing pops up.

I am installing a relatively old version of a software. My guess is that my Mac OS version is too new to run the installer.

How does one usually fix this?

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In system preferences

security

change the download from to anywhere.

enter image description here

  • Isn't there usually a dialogue box that appears if the app isn't allowed? – dwightk Apr 29 '14 at 20:16
  • @dwightk Yes, the window popped up and I did have clicked Yes, trust. – Sibbs Gambling Apr 30 '14 at 0:34

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