以下の物は入れてある?

■USB Mass Storage Support 1.3.5
http://til.info.apple.co.jp/cgi-bin/WebObjects/TechInfo.woa/wa/showTIL?id=60394
http://download.info.apple.com/Apple_Support_Area/Apple_Software_Updates/English-North_American/Macintosh/USB_Updates/USB_Storage1.3.5.smi.bin

■USB Adapter Card1.4.1
http://www.apple.co.jp/ftp-info/reference/usb_card_support_1.4.1.html
http://asu.info.apple.com/swupdates.nsf/artnum/n11543