Apple has released Firmware Updates for 2006 releases of iMac, MacBook Pro, and the Mac mini. The main reason for the update is support for languages that read right to left.
Apple released Firmware Update 1.0 for Macs with Intel processors on 5th April when Boot Camp Beta was released.
Mac mini (early 2006) Firmware Update 1.0.1 (2.8 MB)
MacBook Pro (early 2006) Firmware Update 1.0.1 (2.8 MB)
iMac (early 2006) Firmware Update 1.0.1 (2.8 MB)
UserAgent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/418 (KHTML, like Gecko) Safari/417.9.2

