Sounds like you\'re trying to put the java updater in the disk image. Disk images are read-only, you can\'t modify them or add anything to them. You need to install Planeshift on your Mac, drag the folder from the disk image to your Applications folder in the Finder window. Now you should have no problem putting the updater in the PS folder. Also, you\'ll probably want to delete the disk image after installation to free up some space, it serves no purpose once installed.