Hi, It appears that the FSL installer script does not recognize that my computer is a Mac. I am currently running OS X 10.5.7. Please give advice. Thanks and regards, Kent Conover PS. Here is the error message: $ sh fsl_installer.sh FSL install script ================== Looking for FSL tarball in the current directory... *************************************************************** No FSL tarball specified, assuming you want me to install /Users/conover/Desktop/fsl-osx-patch-4.1.3_from_4.1.2.tar.gz from the current directory. *************************************************************** fsl-osx-patch-4.1.3_from_4.1.2.tar.gz appears to be a FSL patch... Where would you like to install FSL to? [/usr/local] Will require Administrator priviledges to write to '/usr/local' Enter a password to elevate to Administrator rights when prompted Checking OS release ... \033[31;1m[Failed]\033[0m This is Mac OS X and you have provided a non-Mac OS X build of FSL!