Some combinations of browser technology, streaming plug in, and HDCP may be incompatible. If you’re using Safari, try Chrome, or vice-versa. Some DVI inputs can’t handle HDCP, although that should be only the oldest monitors that retain that difficulty.
If you’re using the DVI input on a monitor that has DisplayPort and HDMI connections, switch to one of those. This is clearly a bug (possibly in the HDCP standard), but it’s been consistent for some folks. Some people have also found problems when they have two HDCP-compliant monitors plugged into a Mac mini until they unplug one of them.
While the company has no information about HDCP in its support documents, many people in forums have figured out this fix. If you’re using a DisplayLink dual-monitor adapter, you may need to unplug a second monitor or disable the driver. This should be a problem only in older Macs, however. 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. I use ClickToPlugin in Safari to prevent automatic loading, and it tells me what content is trying to load, which helps troubleshoot these problems. Make sure you have the latest version of Silverlight and Flash, if either of those are involved. (Vudu doesn’t note which standard it currently uses, but it appears to be Flash Netflix has migrated where possible from Silverlight to HTML5.) Older versions of Flash had this issue as well. Both Flash and Silverlight have rapidly been superseded by HTML5-based video embedding. From reading reports by other people, it seems like the likely culprit could be Silverlight, Microsoft’s streaming media standard that for a while was preferred by streaming video services to Flash. Oren sent more details, and it turns out his problem is more specifically with the Vudu service. I recall having issues many years ago with a DVI-based monitor, and found that the monitor lacked support for an early HDCP standard. However, Oren’s question struck me as odd: Apple has fully supported HDCP for years for integral and external displays. (HDCP can also be cracked, making it directly irrelevant.) But anything you can play back digitally is always at risk, so HDCP has mostly been a pain in the patootie rather than an effective way to keep video content from being copied in perfect fidelity.
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