Hi, I'm having an issue watching a film I bought from sky store. If I attempt to load it on my computer I get a message stating 'This video can only be played on displays that support HDCP, please disonnect any external cables and try again.' I currently have two monitors both connected via DVI (t. To play this content, all HDMI connections must support High-bandwidth Digital Content Protection (HDCP). Try the following steps to resolve this issue. Note: if you have an A/V receiver connected to your Roku player, perform the steps on it rather than on your TV. In some cases, a Mac laptop or desktop system won’t properly handshake with HDCP in a monitor unless mirroring is enabled or the laptop lid is closed. This should be a problem only in older Macs.

Check whether your attached equipment is HDCP-compliant. If you've hooked up your MacBook Pro to an external monitor for your viewing pleasure, and it doesn't support HDCP, HDCP may treat this as a piracy attempt, though some material, such as TV shows, will still run. If you replace the monitor with an HDCP-approved one, or if you watch the movie on the Mac's regular screen, it should play without any problems.
Take an older Mac out of mothballs and transfer the movie over to that computer. HDCP works through Apple's Mini DisplayPort, a digital connection to external displays. If you have an older, iTunes-compliant computer that doesn't have DisplayPort, nothing will stop it from playing the movie on the external monitor.
Right-click the material you want to watch, select 'Version' and then choose 'Standard Definition.' This leaves the movie free to run on your external monitor because it's not playing in high-definition format. This doesn't trigger HDCP, so there's no resistance. ITunes attempts to play movies in high-def by default.
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Mac computers that have any of the following ports can connect to HDMI devices. Learn how to identify the ports on your Mac.

  • HDMI port: Connects directly to HDMI using an HDMI cable.
  • USB-C or Thunderbolt 3 (USB-C) port: Connects to HDMI using an adapter, such as the Apple USB-C Digital AV Multiport Adapter.
  • Mini DisplayPort: Connects to HDMI using a third-party Mini DisplayPort to HDMI adapter or cable.

Mac computers that have an HDMI port comply with HDMI 1.4b and support:

  • At least 1080p video over HDMI, and some Mac models support higher resolutions when connecting to 4K displays, 5K displays, and Ultra HD TVs
  • 8-channel/24-bit audio at 192kHz, Dolby Surround 5.1, and traditional stereo
  • HDCP-encrypted playback from iTunes and QuickTime Player (version 10). Safari in macOS Sierra or later also supports HDCP-encrypted playback, if the web page is HTML5-enabled and the content is FairPlay Streaming-enabled and delivered using Media Source Extensions or HTTP Live Streaming.
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If using an adapter, check the specifications of the adapter to learn about supported resolutions and other details.

After making the connection

If your Mac doesn't recognize your HDTV, display, or other HDMI device after making the connection:

  1. Turn off the HDMI device while your Mac is turned on.
  2. Unplug the HDMI cable from your Mac, then plug it in again.
  3. Turn on the HDMI device.

If the video on your HDTV or display extends beyond the borders of the screen, open Displays preferences and adjust the Underscan slider for a better fit. Use any of these methods to open Displays preferences:

  • Choose Apple () menu > System Preferences, then click Displays.
  • Press Shift-Command-A to open the Applications folder. Then double-click System Preferences, then click Displays.
  • If your keyboard has brightness controls, press Option–Brightness Up or Option–Brightness Down.


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If your HDMI device isn't receiving audio from your Mac:

  • Choose Apple menu > System Preferences, then click Sound. In the Output pane, make sure that your HDMI device is selected.
  • If you're connecting using a Mini DisplayPort adapter, make sure that your Mac can send audio over Mini DisplayPort.
  • If you're connecting from a Mac mini, unplug any audio device that is plugged into your computer's Audio-Out port.

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If your Mac goes to sleep while a video is playing or paused, you might see an HDCP error. Quit the app that is playing the video, then open the app again. If the issue continues, choose Apple menu > System Preferences, then click Energy Saver and adjust the settings so that your display doesn't turn off.

Learn more

  • If your Mac has an HDMI port, you can use the Apple HDMI to DVI Adapter to connect to a DVI display.
  • Mac computers don't support using CEC (Consumer Electronics Control) to control HDMI devices.