These glyphs can be found at the following Unicode code points:
U+2630 ☰
U+2637 ☷
U+2633 ☳
U+2634 ☴
U+2632 ☲
U+2635 ☵
U+2636 ☶
U+2631 ☱
U+2318 ⌘
U+03B4 δ
The apple logo is more problematic since it resides in the
Unicode private area at
U+F8FF
It will likely show up only in fonts distributed by Apple. Notably, in the
(huge, unrestricted shareware, somewhat hugly, but quite comprehensive) Code2000 font it conflicts with the "KLINGON MUMMIFICATION GLYPH" :
To reduce the size of an embedded font, I would suggest to first strip it, only keeping the glyphs that you use. A tool like
GlyphIgo might come handy.