i need help as i'm new to iMac and still getting used to the thing. i keep trying to play stuff, movies that ive downloaded and also pictures that ive put into slideshows but keep getting told i dont have the right codec and things won,t play.
i need to know how to get the correct formats or codecs on my iMac so i can play things back.
please help a very confused 40 year old technophobe.