So i want to upgrade my installation from FSL 4 to FSL 5. I moved my previous installation to a old folder (fsl_old unser /usr/local). I downloaded the python script and I tried running it from terminal as shown in the website: http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FslInstallation/MacOsX I get the following error ( I tried it in different sheels, bash, tcsh, csh and nothing...) : rperea@kum-rhonea2:/usr/local$ sudo python fslinstaller.py Password: --- FSL Installer - Version 2.0.8 --- [OK] Installer is current Where would you like to install FSL? [/usr/local]: Traceback (most recent call last): File "fslinstaller.py", line 1912, in <module> installer(options,args) File "fslinstaller.py", line 1778, in installer this_install = FslInstall(fsldir, new_version, mirror, keep, which_shell()) File "fslinstaller.py", line 1070, in __init__ self.profile = "/".join((path.expanduser("~"), self.__class__.shells[shell])) KeyError: 'zsh' Any help?