Hi, I've had no problem installing, configuring and using xmonad+xmodbar under Debian. No such luck with Mac OSX 10.5.x and 10.6.x. In both cases, after installing the right XCode version and Haskell platform, my attempts to install xmonad-utils fail with imac:~ flengyel$ cabal install xmonad-utilsResolving dependencies... Configuring xmonad-utils-0.1.2... cabal: Missing dependency on a foreign library: * Missing C library: crypt This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is. cabal: Error: some packages failed to install: xmonad-utils-0.1.2 failed during the configure step. The exception was: ExitFailure 1 The C crypt library is no longer maintained in macports. What does the list suggest? Thanks, FL