"This movie requires QuickTime, which is not supported by this version of iTunes."

Ok. So it is 2014 and I am having the same problem.

As soon as I switched iTunes to 32 bit, it works! But we shouldn't have to do that.

Hopefully if enough people have the problem, then it will get resolved.

When I try to open in 32 bit mode, it doesn't even open Itunes. It says:

"ITunes requires 64-bit mode.

To run ITunes in 64-bit mode, [instructions for how to deselect the option "Open in 32-bit mode"]"

My podcast won't open. Quicktime/iTunes error message.

Same problem here when I switch to 32 bit. Anyone have any updates on how to run these older podcasts in current systems?

Yosemite 10.10.1

iTunes 12.0.1.26

Apple made a mess out of iTunes. This is pathetic. Apple Quicktime is not supported by Apple iTunes. They are starting to stink like old Microsoft.

this may be sacrilege but can anyone offer assistance with the windows side of this problem? I thought I was already running iTunes 12 on my PC but when I updated this afternoon I received the whole quick time/iTunes message. Pretty frustrated with apple at this point. I use this computer only as a media computer for my apple TV and audio files through my home network so I don't think switching the default player to Quick Time will solve my issue. Going to try and download an old version of iTunes to get up and running but any helpful comments would be appreciated.

For Windows users running into this thread:

The current (nearly) all 64-bit version of iTunes for Windows doesn't integrate with QuickTime. If you have content that needs QuickTime on your system then uninstall iTunes and all supporting components, then install the version of iTunes found here: iTunes for Windows (64-bit - for older video cards) and reinstall QuickTime. The "for older video cards" release is a 64-bit installer for the core 32-bit iTunes application, similar to all 64-bit releases of iTunes prior to 12.1 and will work with QuickTime.

Your library should be unaffected by these steps but there are also links to backup and recovery advice should it be needed.

See Troubleshooting issues with iTunes for Windows updates if you have problems uninstalling or reinstalling components.

tt2

For Windows users running into this thread (again):

QuickTime is no longer supported by Apple. It is recommended that you uninstall it if you still have it.

See Troubleshooting issues with iTunes for Windows updates > QuickTime for more information

tt2