All the ones that don't play properly don't (no codec takes its place however - only the Video Renderer and the DiVX codec are in use on the non-audio files). Not sure if this tells me something - ...

If you’re faced with this 0xc00d5212 Codec Error, you can try our recommended solutions below in no particular order and see if that helps to resolve the issue. Update graphics card drivers Uninstall ...

.dmg files are not compressed. You just open them: select by clicking with mouse and choosing open under the Finder's file menu or else just double click the icon. That will mount a new "device" on ...