GISLook & GISMeta
GISLook and GISMeta are plugins for Mac OS X 10.5 that show GIS data in the Finder.Use GISLook to browse and preview GIS data in Finder windows, including Cover Flow and Quick Look windows.
Use GISMeta to view the size of GIS raster grid files.
High grid values are represented in white, low values in black.
To activate Quick Look, select a document in the Finder and press the space bar (or choose File > Quick Look) and the file will be viewable in a separate window.