From interview with Mark Olsen you can read the :
The eMac port was done by Frank Mariak, and as far as I understand, with the Mac mini code in place, that port wasn't too much work. I believe only sound recording isn't working. eMac support will likely be added to MorphOS 2.5.
A link to the interview :
Power Mac G5 2.3 Ghz & MorphOS 3.14 & OSX 10.5
Mini G4 1.5 Ghz & MorphOS 3.9
BlaBla Team Member -> http://blabla.ppa.pl
AmiParty Team Member -> http://www.chal.pl/