Linux. Ah I see what happened. There is no such thing an Apple logo Unicode character. Whatever sits in the Private Use Area is only defined within the context of a specific font. You are using a font that has Apple's logo in it on that position. You may want to avoid using it in normal text.
This page explains it neatly:
http://hea-www.harvard.edu/~fine/OSX/unicode_apple_logo.html