I don't know if this is relavent but this was on the Martin Bailey Podcast.
"Another nice addition is the Gigabit Ethernet port for tethered shooting. BUT, and this is a big BUT, Canon decided that the Mac OS was not important enough to update the EOS Utility to support Wired shooting just yet. You can pair the camera with the computer, that part works fine, but EOS Utility doesn’t work. What’s even more frustrating is that all through the Canon documentation, it states that you can use EOS Utility to shoot with the Ethernet connection without any restrictions!
I spent a whole morning trying to get this working, and when I eventually gave in and called support, I was told it was not yet supported. When I asked to see where that was stated publicly, I was lead to a Web page hidden about 5 layers down on the Japan Web site. You’d never find it until you run into a problem, especially when the documentation already told you everything was going to be just fine. Oh, and I couldn’t find a mention of this anywhere on the US Canon Web site.
I figured I’d try connect to the camera with the WFT Server which is purported to have a pseudo EOS Utility that works via a Web browser, but with a tiny LiveView window, no auto-focus and no automatic downloading of images, it’s a total waste of time.
Canon, I love you guys, you know that, but stop wasting your time developing crappy applications like the WFT Server on the camera, and dare I say it, DPP and ImageBrowser could go too, and just concentrate on supporting the drivers and critical utilities that your customers need to use your cameras! The Mac OS is important to the photography community. It always has been, so get your acts together!"