How to change word selection separator characters in Mac OS X?

Solution 1:

The only difference between the two English options (at least in for ASCII characters) seems to be whether period and colon are treated as part of words.

Part of words:

  • '.:_ in Standard
  • '_ in English (United States, Computer)

Not part of the start or end of words:

  • $+<=>^` in Standard
  • $+<=>^` in English (United States, Computer)

Solution 2:

The answer by user ` is correct for pre-osx-10.9 (I think). However, in OS X 10.9 and later the System Preferences changed a bit. It now looks like this:

Language & Region

Solution 3:

To the best of my knowledge, selection word separation is done on a per-application basis, not a system-wide basis. iTerm allows you to configure the characters, but that's an extremely unusual option; most applications use the predetermined defaults in the Cocoa and Carbon libraries, which are hard-coded, not drawn from a centralized preference setting.