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?


In system preferences


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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