Where can I find the unicode symbols for Mac functional keys? (Command, Shift, etc.)
If you are talking about something like this: &amp;#8984; (the ⌘ key), then you are looking for this chart:
HTML Entity     GLYPH  NAME
&amp;#63743;              Apple
&amp;#8984;         ⌘      Command, Cmd, Clover, (formerly) Apple
&amp;#8963;         ⌃      Control, Ctl, Ctrl
&amp;#8997;         ⌥      Option, Opt, (Windows) Alt
&amp;#8679;         ⇧      Shift
&amp;#8682;         ⇪      Caps lock
&amp;#9167;         ⏏      Eject
&amp;#8617;         ↩      Return, Carriage Return
&amp;#8629; &amp;crarr; ↵      Return, Carriage Return
&amp;#9166;         ⏎      Return, Carriage Return
&amp;#8996;         ⌤      Enter
&amp;#9003;         ⌫      Delete, Backspace
&amp;#8998;         ⌦      Forward Delete
&amp;#9099;         ⎋      Escape, Esc
&amp;#8594; &amp;rarr;  →      Right arrow
&amp;#8592; &amp;larr;  ←      Left arrow
&amp;#8593; &amp;uarr;  ↑      Up arrow
&amp;#8595; &amp;darr;  ↓      Down arrow
&amp;#8670;         ⇞      Page Up, PgUp
&amp;#8671;         ⇟      Page Down, PgDn
&amp;#8598;         ↖      Home
&amp;#8600;         ↘      End
&amp;#8999;         ⌧      Clear
&amp;#8677;         ⇥      Tab, Tab Right, Horizontal Tab
&amp;#8676;         ⇤      Shift Tab, Tab Left, Back-tab
&amp;#9250;         ␢      Space, Blank
&amp;#9251;         ␣      Space, Blank

You also can copy the glyphs directly!