When a wd hard drive (terabyte mybook) is not recognized by a Mac running leopard connect the drive to the mac using USB to check the drive. If it is ok then insert the Techtool pro 4.6.1 disc into the Mac and boot from it choosing the edrive by pressing option key on bootup. The techtool disc runs OS 10.4.2. Then zap the PRAM, allowing THREE cycles before releasing the four keys for the zap. Connect the drive's power and then the Firewire 800 cord and you should see the wd icon come up on the yellow eDrive desktop. When you reboot (option Key) choose your usual hard drive as bootup and you should see the wd icon on your 10.5.x This has held up for me for a month and I feel it is the best workaround until Apple upgrades the Leopard firewire code.
There are no wd driver upgrades necessary. All is handled by the Mac OS.
Martin_Feldman
There are no wd driver upgrades necessary. All is handled by the Mac OS.
Martin_Feldman