Nope, Premiere will only captures with firewire.
the roxio dongle does have software that comes with it. it may be mac compatible. i am not entirely sure. but you can use that to capture to dv-avi, and premiere will recognize that. i used one for about a week though, wasnt too impressed with the quality, and upgraded to a hauppage composite capture card, still wasnt impressed, and finally i have a canapous 110. it is perfect. so if your mac has firewire (most do) save yourself the money and grief and just buy an advc 55 or advc 110. they just work.