I've been trying to find a way to get Aqua back on my Mac, and getting Aqua to display under any OS has been a trackless waste. But I've been able to stitch something together (nothing new) to offer a Linux old enough to display old Aqua themes and "look and feel" appropriately, while running a modern version of Firefox. And now it's here.
Some people regard the Aqua theme as done and gone, and passé. It's out of the Mac mainstream at any rate, and has been for the past couple of releases of Mac OSX.
But with a little help from VMware and a little open sourced Linux theming magic, it's possible to get Aqua back:
This configurable and nostalgic blast from the past, made available through customizable themable Linux, provides a small treat for people who liked the good old days of Mac Aqua. And it is available on all of Windows, Linux, and Mac: search for the free VMware Player, VMware Workstation, or VMware Fusion from the VMware site.