It seemed more like warning than whining, if indeed it's any more than a simple story of something vaguely surprising to the author. There is no need for blog posts to be interesting or momentous, only well-written.
And "Mac OS X is like Unix, but some of the familiar Unix-like tools don't work" seems like a useful enough warning to me. After all, who wants to learn new tools? Nobody who has something to actually do...
Or, "Mac OS X _is_ UNIX, so all of the familiar UNIX tools work, but Linux is _like_ UNIX, so many of the familiar tools work differently." Where differently is generally a superset.
And "Mac OS X is like Unix, but some of the familiar Unix-like tools don't work" seems like a useful enough warning to me. After all, who wants to learn new tools? Nobody who has something to actually do...