If a FireWire device stopped working immediately after updating to Mac OS X 10.3.6, download and install Mac OS X 10.3.7 or later (Mac OS X 10.3.9 is the latest version of Mac OS X 10.3.x). For example, a connected FireWire hard drive may not mount (appear on the desktop), but it may appear in System Profiler.
Important: If a third-party FireWire hard drive is connected, disconnect it before installing the 10.3.7 or later update. Reconnect it and turn it back on after installation is complete and the computer is restarted.
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