Ever since I switched to the dark side and bought a macbook pro this spring, I've had slight trouble developing (and using) Amarok 2 and KDE4. Imagine my frustration as I spent a week cycling through all possible permutations of {VirtualBox, Fusion, Parallels} and {Ubuntu, OpenSuse, Mandriva} trying to get a development environment that didn't make my eyes bleed (or my computer choke).
Anyway, after approximately 7 months, I have been able to finally use Amarok as it was meant to be used: native on OS X!

How did I do this, you ask?
The KDE Mac Site
However, if you want to be able to build a collection (as I have in the screenshot above), you'll need to compile/install mysql manually (following instructions for
MySqlE). But just out of the box, I got perfect audio,
low CPU/memory usage.. and in general awesomeness.
In other news, I have locally switched Amarok from using our old last.fm code to a brand new snapshot that will provide much more long-term stability. This should resolve the various last.fm bugs that have been around the Amarok code for quite a while. and you can see the result here:
Finally, if you are still wondering what other crazy stuff you can do with amarok, look no further:
let me give my huge thanks to our very own illogic-al, who has dedicated more brain cells to packaging amarok/kde on os x than i would like to count, and who is officially awesome.