Thumbnail-enabled catalog file format used by DiskCatalogMaker, a file cataloging program for Mac OS X; contains a database of files that are stored on multiple discs; created with DiskCatalogMaker 5.5 or later.

A DCMD catalog file is similar to a .DCM catalog, but supports thumbnail images for .GIF, .JPEG, .PNG, .MP3, .M4A and movie files. DCMD files cannot be read by DiskCatalogMaker 5.0 or earlier.