ATI Radeon X800 XT ROM Update 109 for Mac was available as a free download on our software library. The program lies within Audio & Video Tools, more precisely General.
From the developer:
The June 2005 ROM installer provides the ability to revert to the original ROM for the RADEON X800 XT MAC EDITION. The ROM Update installer provides this downgrade option at setup. Safe Boot is required to use this ROM Update. Hold shift during boot to Safe Boot. The computer MUST NOT be interrupted (shut down or power failure) during firmware update.
You may want to check out more software for Mac, such as iMac Graphics Firmware Update, which might be similar to ATI Radeon X800 XT ROM Update.
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