OS X 10.8 Gatekeeper Prevents Caedium from Installing

OS X Mountain Lion 10.8 gives the follow notice when I tried to open Caedium:

"Caedium can't be opened because it is from an unidentified developer."

How do I run Caedium on OS X 10.8?

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Caedium Workaround for OS X 10.8 Gatekeeper

OS X Mountain Lion (10.8) uses a new security feature known as Gatekeeper to prevent applications not registered with Apple from running. Currently Caedium is not registered with Apple, so as a work around prior to installing and launching Caedium for the first time:


  1. Right-click (or control click) on the Caedium.dmg file after downloading and select open
  2. Install Caedium as normal
  3. Right-click on the Caedium application and select open the first time you want to launch Caedium. You should not need to repeat this process when you launch Caedium in the future



  1. Launch the OS X System Preferences dialog and select the Security and Privacy panel
  2. Set Allow applications downloaded from: option to Anywhere
  3. Install and run Caedium once as normal
  4. Reset the Allow applications downloaded from: option to your preferred setting, e.g., Mac App Store and identified developers