The U-8 does seem to have some Mac compatability through a VST plug-in. I don't know what the plug-in is, or if it's available, or what, but it does seem to exist somewhere (or so this pages suggests).
You can look here, but I didn't see anything that screamed "ROLAND U-8 FOR THE MAC!" so good luck.
Raskolnikov
Guitar Tricks Moderator
Careful what you wish for friend
I've been to Hell and now I'm back again
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Guitar Tricks Moderator
Careful what you wish for friend
I've been to Hell and now I'm back again
www.GuitarTricks.com - Home of Online Guitar Lessons