U+F8FF is the last code-point of the private use zone. Appearance of the character is entirely random and depends on the font in use. Don't use it for anything

U+F8FF is the last code-point of the private use zone. Appearance of the character is entirely random and depends on the font in use. Don't use it for anything outside of an environment you can control. For me it's displayed as a rectangle with F8FF in it, because I'm using Linux, which surprisingly does not ship fonts with the Apple logo in it ;)