Davoud <
st...@sky.net> wrote:
> Davoud:
>
> > I bought the original Star Wars movie from iTunes as a refresher before
> > seeing the new one. An attempt to play it gives me this:
> >
> > "The selected movie won't play on your display.
> >
> > "This movie can be played only on displays that support HDCP
> > (High-bandwidth Digital Content Protection)."
> >
> > The iMac is not exactly ancient: Late 2014, Retink 5K, 27-inch. 32 GB
> > RAM, 4GB VRAM.
> >
> > What the hell!?
>
> None of the DRM horse-shit explains why the video will play on my
> Mid-2012 MBP Retina and on my Apple TV. Any ideas from persons who do
> not have an ax to grind?
The problem is triggered by the DRM, because as far as iTunes can tell,
your iMac's internal display does not have a copy protected video path.
This might be a bug affecting your iMac model (probably in the OS or its
video drivers but it might be an iTunes bug), or might be a random
glitch that could be fixed by restarting, or might be something messed
up on your particular iMac, or caused by third party software installed
on that computer which is interfering with the video path.
More information would help: which OS X version are you running, which
iTunes version, and have you you tried restarting yet?
Do you have any external displays connected, or software which pretends
to be an external display? If so, disconnect the display or disable that
software and try again.
Have you tried creating a new user account, signing in to the same Apple
ID and playing the movie from iTunes in that account? (It will require
authorising that user account to play content from iTunes using your
Apple ID, but you can deauthorise it again after the test.)
Have you tried starting in safe mode to disable third party software, or
tried booting from a separate clean system with no third party software
installed?
The Retina 5K iMacs have a somewhat unusual video display interface,
involving two display channels (each driving half of the display) bonded
together. It is possible that this breaks something to do with DRM, but
I'd be very surprised if Apple hadn't allowed for protected content in
the design, suggesting a bug or software conflict is more likely than a
fundamental compatibility problem.
--
David Empson
dem...@actrix.gen.nz