- according to Apple's publication style guide, yes, "Mac people" use

  the term Installer (always capitalized, however)
- generalize the text about the term "installer" in a fairly
  reasonable way

Doc/dist/dist.tex

@@ -1149,8 +1149,8 @@ either as a ``binary package'' or an ``installer'' (depending on your
 background).  It's not necessarily binary, though, because it might
 contain only Python source code and/or byte-code; and we don't call it a
 package, because that word is already spoken for in Python.  (And
-``installer'' is a term specific to the Windows world.  \XXX{do Mac
-  people use it?})
+``installer'' is a term specific to the world of mainstream desktop
+systems.)
 
 A built distribution is how you make life as easy as possible for
 installers of your module distribution: for users of RPM-based Linux