[hn9780470248775]

Apparently Apple uses U+F8FF, part of the Unicode "Private Use Area", to represent its logo. It's not surprising that it fails to render on non-Apple platforms, given this warning in http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/CORPCHA... :

  # The following (1) is for the Mac OS Roman encoding
  # (also used in Symbol & Croatian).
  # NOTE: The graphic image associated with the Apple logo character is
  # not authorized for use without permission of Apple, and unauthorized
  # use might constitute trademark infringement.
  0xF8FF	# Apple logo # Roman-0xF0, Symbol-0xF0, Croatian-0xD8

Additional references: http://hea-www.harvard.edu/~fine/OSX/unicode_apple_logo.html http://www.fileformat.info/info/unicode/char/f8ff/index.htm https://en.wikipedia.org/wiki/Private_Use_Areas

[TazeTSchnitzel]

Well, by definition, the Private Use Area is for private use. An OS vendor can put whatever they like there, as can a user.