OS X not so fool proof

Yesterday my Mac Mini let me know there was an available security update. Should be easy enough I thought so I clicked the “Install” button. After about 2 minutes of installing I received the error that the updated failed to install and had been moved to the trash. If I wanted to attempt to reinstall the update I should remove the package from the trash and click on it. Again, seems easy enough, so I tried.

Nothing happened.