Haxial DiskCatalog for Mac

From Haxial Software:

Haxial DiskCatalog is a fast utility for cataloging CDs, hard disks, folders, and any other type of disk. It allows you to browse the contents of disks without having to find them and insert them into your computer. More importantly, you can search all of your disks at once (again without having them in the computer), and DiskCatalog will display a list of all the files found, and their location. When you're looking for a file and you don't know where it is, this is much easier than manually searching all your disks. DiskCatalog is designed to be very fast -- search results usually appear instantly.