It's very common for linux applications to store stuff in $XDG_DATA_HOME (~/.local/share by default) (config files and caches go somewhere else) In my ~/.local

It's very common for linux applications to store stuff in $XDG_DATA_HOME (~/.local/share by default) (config files and caches go somewhere else) In my ~/.local I also have a bin/ directory (created by some Haskell tool), so rather than putting stuff in /Users/username/usr/local, I think it might make more sense to recreate the (needed parts of) a unix fs hierarchy in /Users/username/.local There's also ~/LibrarySupport on Macosx, if I remember correctly... but I think that contains user editable configuration files as well