OS X isn't the issue (I don't think) since I can use Greek in some places. (+Ãƒâ€šÃ‚Â¦+Ãƒâ€šÃ‚Â¦-ÃƒÆ’Ã¢â‚¬Å¾ +++Ãƒâ€šÃ‚Â¦++-ÃƒÆ’Ã‚Â¼-ÃƒÆ’Ã¢â‚¬Å¾ +++Ãƒâ€šÃ‚Â¦ +Ãƒâ€šÃ‚Â¦-ÃƒÆ’Ã‚Â¼+Ãƒâ€šÃ‚Â¼-ÃƒÆ’Ã‚Â¥-ÃƒÆ’Ã‚Â« -ÃƒÆ’Ã‚Â¢-ÃƒÆ’Ã‚Â¤+Ãƒâ€šÃ‚Â¦ +ÃƒÆ’Ã‚Â²+++++++++Ãƒâ€šÃ‚Â¦+Ãƒâ€šÃ‚Â¦+Ãƒâ€šÃ‚Â¼ +Ãƒâ€šÃ‚Â¦+++++Ãƒâ€šÃ‚Â¼ -ÃƒÆ’Ã‚Â®-ÃƒÆ’Ã‚Â§+Ãƒâ€šÃ‚Â¦ -ÃƒÆ’Ã‚Â¢-ÃƒÆ’Ã‚Â¤++ MS Word +Ãƒâ€šÃ‚Â« AppleWorks - +Ãƒâ€šÃ‚Â¦+Ãƒâ€šÃ‚Â¦++ +++Ãƒâ€šÃ‚Â¡-ÃƒÆ’Ã‚Â¼-ÃƒÆ’Ã‚Â« +Ãƒâ€šÃ‚Â¦+Ãƒâ€šÃ‚Â¦+Ãƒâ€šÃ‚Â¦-ÃƒÆ’Ã‚Â¤+Ãƒâ€šÃ‚Â»)
Too bad you can't spell yet
It may be an issue with fonts as I suspect the majority that ship with the Mac do not have Greek, let alone Polytonic Greek (the beast I just had a look at does not appear to have any Polytonic Greek fonts). I noticed that almost everytime I changed font in Word, it automagically changed the keyboard to USA english, perhaps because the font did not have Greek charaters?
Me, I'm still trying to figure out support for polytonic Greek under LINUX, so MacOS X is a ways off for me yet, and I am the Mac support guy here
(actually I am the everything plugged into the wall socket support guy)
Sorry I'm not much help.