Laut Beschreibung
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Some features related to drive functionality currently do not function under Mac OS 10.5 Leopard.
Western Digital has released a new WD Drive Manager utility for Macintosh that is compatible with Mac os 10.5 Leopard. To achieve the full functionality of lights, capacity gauge, and power button, please download and install this software from the link below.
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Und weitere Infos bei Artikel Answer ID 1707 (den ich natürlich erst später fand), sagen:
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MPORTANT: The following precautions must be performed before applying the firmware update:
WD Anywhere Backup MUST be turned off in the system tray
Apple Time Machine MUST be turned off
WD Button Manager MUST be uninstalled from the system
All AntiVirus software MUST be disabled
All Anti-Spyware software MUST be disabled
ANY and ALL programs that would require drive access during the update MUST be disabled
Failure to perform these precations may cause data corruption/loss and/or drive failure
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Warum steht so was Wichtiges nicht direkt beim Download link ?
Oder kommt als Info bei der Installation ?
Krass, man muss immer mehr selber machen und beachten

OS X wird in der Beziehung immer mehr wie WIN !!!
Naja, dann lass ich mal laufen und schaue mal wie es am Ende ausgeht

Jochen