I don't have a Mac, so I can test any of this myself.
However, I don't notice any substitutions that would go from U+2019 (right single quotation mark) to U+2079 (superscript nine) in the font.
I wonder if somewhere in the source code for Keynote there's some code that says, 'When the user types an apostrophe, convert it to U+2079' when they meant '...convert it to U+2019'.
Do any other fonts with a superscript nine (U+2079) exhibit this behavior in Keynote?
I don't have a Mac, so I can test any of this myself.
However, I don't notice any substitutions that would go from U+2019 (right single quotation mark) to U+2079 (superscript nine) in the font.
I wonder if somewhere in the source code for Keynote there's some code that says, 'When the user types an apostrophe, convert it to U+2079' when they meant '...convert it to U+2019'.
Do any other fonts with a superscript nine (U+2079) exhibit this behavior in Keynote?