Mac Os X doesn't support glyph variants

[_Giorgio_Del_Vecchio_]

I have installed Garamond Premier Pro in my iMac G4 equipped with Tiger 10.4.8. All works fine with Garamond premier pro, but not the classical greek capitals with diacritics such as oxia, dasia and so on. I get the info "The application in use doesn't support glyph variant" and so I cannot use the above mentioned capitals. Any tip or suggest?

Thank you so much

Giorgio (from Italy, excuse my english)

[_Herb_V_B_]

You didn't mention which application you're using that gives the
message. MS Word? InDesign? Something else?

Your question might be better addressed in a forum dedicated to that
application, or possibly in adobe.typography, instead of this
developer's forum.

- Herb