I think WMP is available for Mac. (I'm pretty sure I've downloaded it on my OS X-running Powerbook). Also, if the Edirol records onto Compact Flash cards, there are cheap (under-$20) USB card readers (several formats in one unit) that work with Macs. The fact that the Edirol can record w/o compression is a plus, as Minidisc uses ATRAC proprietary compression.