I've installed the Glasgow Haskell Compiler 6.4.1 for OS X on my system. I have The Haskell School of Expression book and the instructions for setting up and running the SOE software seem to have a different configuration compared to GHC 6.4.1. Namely, it's meant to use X11 and locations for files are different. I presume the easiest thing to do is uninstall GHC 6.4.1 and install the binaries available on the SOE site. I've attempted to run the uninstall AppleScript for GHC, but I get a "Finder got an error: Can't get item "GHC-6.4.pkg" of folder "Receipts" of folder "Library" of startup disk. (-1728)" error. What should I do? If I'm going to uninstall it by hand, I don't know which files need to be removed. And I also wonder if it is actually preferable to somehow keep GHC and just configure it to work with the SOE by installing the GraphicsLib library and getting it to use X11. And I'm not clear about how I should do that. Or does the GHC already have GraphicsLIb as part of it? If so, shouldn't it launch an X11 Xterm terminal rather than the standard OS X Terminal? Xavier