you can not use itunes to sync to the fuze.
you will need to put the fuze in MSC mode and connect it to your imac. it should mount as a disk on the mac desktop. your podcasts will need to be in mp3 format (aac itunes default is not compatible witht he fuze) if your podcasts are in mp3 format then you can drag and drop them to the podcast folder on the fuze.
