I had upgraded my old Mac with an ultra-fast Intel SSD drive, so naturally I kept it and simply popped it into the new MacBook Pro. Everything "just worked" as I expected. I've done this before with Macs running OS X.
It is truly a beautiful thing to be able to just plop a hard drive into another Mac and have everything work perfectly and not have to set everything up again.
Every now and then, though, this can lead to strange problems. This time around Netflix gave me trouble. I kept getting "Error n8156-6013" immediately after clicking "Play". My PS3 and wife's Mac played movies just fine.
Turns out that Microsoft Silverlight (the tech that Netflix uses for streaming) creates a DRM file on your hard drive that needs to match up with your hardware exactly for the server to authenticate properly.
If you get this error after swapping or cloning your Mac hard drive, all you have to do is delete this file and restart your web browser:
/Library/Application Support/Microsoft/PlayReady/mspr.hds
http://www.kristoferbrozio.com
