How do you use dvd computer features on the imac apple computer os x 10.3.4
that appear to be designed for the pc ?...

In massachusetts cambridge public library makes available the dvd movies
harry potter and the sorcerer's stone and harry potter and the chamber of
secrets.

But the second discs in each pack appear to work with pc not imac apple
computers !

a. How do you use the dvd second discs computer features on the imac apple
   computer?...

b. How do you persuade the media to use more universally compatible formatting?...


References
http://store.warnervideo.com/whv.product.asp?upc=085392246724&fmt=dv&mscssid=LGE337UVCUFT8LS8E5ADJ08Q1X604956

http://store.warnervideo.com/whv.product.asp?upc=085392359226&fmt=dv&mscssid=LGE337UVCUFT8LS8E5ADJ08Q1X604956