In a different thread, Ellery Bann wrote: > 1) Can a command line tool, e.g. otool, be of the types Universal, > Intel, or PPC? $ file /usr/bin/otool or $ otool -h -arch all /usr/bin/otool > 2) If so, is that type defined by a gcc switch? -arch arch Turn on 'Log UNIX commands' in FBtoC, and you will see, for example: gcc Temp_Project.o _0_TranslatedRuntime.o -o /Users/rp/Desktop/ test.app/Contents/MacOS/test -arch i386 -arch ppc - DMAC_OS_X_VERSION_MIN_REQUIRED=1050 -mmacosx-version-min=10.5 - isysroot /Developer/SDKs/MacOSX10.5.sdk -framework Carbon -framework QuickTime -framework IOKit -Wl,-dead_strip 2>&1 > 3) Is a command line tool defined as a Unix Executable File by > Finder? How does it know? By its binary headers? I think that any executable file with no extension is reported as 'Unix Executable File'. Certainly the Finder does not examine the content (but /usr/bin/file does). Robert P.