dear fsl community i used for several months (until end of november) fsl without any problems but after a possible updating of my mac (os10.6.8), i'm not more able to run it and i get this following message on my terminal: "dyld: Library not loaded: /usr/X11R6/lib/libX11.6.dylib Referenced from: /Applications/fsl/extras/bin/fslwish8.4 Reason: image not found Trace/BPT trap" in this context, i decided to update and to re-install completely the new fsl version, but the same problem occured giving the same message: below, the whole procedure from the installation to the error message: "Where would you like to install FSL to? [/usr/local] /Applications Checking OS release ... [OK] Checking CPU type... [Skipped] Checking install file...(this may take several minutes) [Skipped] Installing FSL from /Applications/fsl-4.1.9-macosx.tar.gz into /Applications... [OK] Would you like to install FSLView.app into /Applications (requires Administrator priviledges)? [yes] yes Moving old FSLView into the Trash Password: Installing FSLView into /Applications... [OK] Patching environment .bash_profile already contains a FSLDIR definition which is correctly configured, not changing. /Users/JMP macbook-pro-15-de-jean-michel-pignat:Applications JMP$ fsl dyld: Library not loaded: /usr/X11R6/lib/libX11.6.dylib Referenced from: /Applications/fsl/extras/bin/fslwish8.4 Reason: image not found Trace/BPT trap" thanks best regards jean michel pignat