I have two problems using this monitor on my Mac Pro (middle 2010) with a Sapphire HD 7950 graphics card, and running mavericks.
The severe one is that every hour or so, my screen disappears to be replaced by vertical stripes. Rebooting the Mac, even after disconnecting its power or doing a Cmd-alt-r-p reset does not fix this. What does fix this is unplugging the U3417W power cord at the back of the U3417W.
Is this the fault of MacOS, the graphics card, or the U3417W?
The second problem, is that in Standard or Custom display modes, the monitor exhibits a pinkish rectangle on the left edge. Multimedia mode or game mode do not display this. Dell claims this is an Apple problem. I find this hard to believe because changing the monitor setting with no change on the computer cures this.
For my notes, click my username and via private message send me the U3417W service tag number.
For Dell to troubleshoot, you must test the U3417W on a dedicated Windows operating system PC to see if the issues are present.
You should also post the issue on the Apple Forum and see what other Apple users have done as far as Apple PC troubleshooting and possible Apple proprietary cabling to purchase.