From time to time when I recieve files from clients, my mac calls them a kind of file called a Unix Executable File. When I look at the kind of file in Finder or "Get Info", it says its a Unix Executable file. Most of the time I know exactly what kind of file it is, a font file, psd, ai, even a jpeg, so I can go to the program and choose File>Open. From time-to-time I'm unsure what format the file is, so I can't necessarily go to the program and do a File>Open. I sound "incapable" when I go back to a client and asked them what format the file is in. I included a pic of my latest problem. I received a Quark file from a client and the Quark file as well as the packaged fonts and some photos are coming back as Unix Executable Files... I didn't have quarkxpress so I had to go back to my client and ask what type of file it was... I hate doing that. Whats going on?