I used darwinbuild to build xnu-792.6.22 and it seems to me the file sizes are a bit high: ls -l Roots/xnu/xnu-792.6.22.root~1/mach_kernel -rw-r--r-- 1 root wheel 7790644 Nov 4 15:03 Roots/xnu/xnu-792.6.22.root~1/mach_kernel ls -l Symbols/xnu/xnu-792.6.22.sym~1/mach_kernel -rw-r--r-- 1 root wheel 51211964 Nov 4 15:03 Symbols/xnu/xnu-792.6.22.sym~1/mach_kernel ls -l /mach_kernel -rw-r--r-- 1 root wheel 4330232 Oct 3 21:04 /mach_kernel How is it that the version in Roots is so much larger than the version with symbols? After mounting a case system file system with permissions on, I just ran these 3 commands (fluff removed): /usr/local/bin/darwinbuild -init 8F46 /usr/local/bin/darwinbuild -fetch xnu /usr/local/bin/darwinbuild xnu Any ideas? -- Thanks, James Reynolds University of Utah Student Computing Labs james@scl.utah.edu 801-585-9811