The Firmware Restoration CD can restore the firmware of an Intel-based Macintosh computer. Restoring your firmware will reset some of your computer’s preferences to defaults.
You can only use this to restore the firmware after an interrupted or unsuccessful update. If your computer is already in this state, you’ll need to download the software and create the CD on another Macintosh computer, or you can take your computer to an Apple Store or Apple Authorized Service Provider to restore your firmware. This CD can be created on either a PowerPC- or Intel-based Mac, but only works with Intel-based Macs.
The support page for this update has instructions on how to choose the correct Firmware Restoration CD Image and how to restore your Mac’s firmware using the Firmware Restoration CD. Firmware Restoration CD 1.8 is a 22.5 MB download.
Graphics Firmware Update 1.0 for the iMac and Mac Pro1 1.0 is now also available if you run Windows 7 using Boot Camp on your iMac (with NVIDIA GeForce 7300 or 7600 GT) or Mac Pro (with NVIDIA GeForce 7300 GT or Quadro FX 4500) computer. Download here.
Last but not the least, iMac Late 2009 Windows 7 Drivers installs the necessary drivers to implement Windows 7 on the iMac (21.5-inch, Late 2009) and iMac (27-inch, Late 2009) computers.
To install the drivers, download the Windows 7 Installation Enabler, which contains the required drivers for the iMac (21.5-inch, Late 2009) and iMac (27-inch, Late 2009) computers. Then copy them to a MS-DOS-formatted USB storage device, insert that into a USB slot on the computer, then install Windows 7. For more information, check out http://support.apple.com/kb/TS3173. Download the drivers here.
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