Hello everyone,
I have recently bought a 3ware sidecar and Leopard is not detecting the card. I have looked on many forums and searched as well and still nothing. I have installed it with the drivers given by the company. I would call and ask them for support, but since I have a hackintosh that is a no go. Also I know it is connected correctly because when I boot windows, it reads it fine. Any help is welcome.

Specs
Kayway 10.5.2
C2D 2.33 1333Mhz
4Gb 800Mhz
Abit IP35 Pro
Nvidia 8600GT
3ware 9650SE RAID (http://www.3ware.com/products/Ext_serial_ata2-9000.asp)
I have everything working, but my new Raid card.

The forums I have checked:
http://forum.insanelymac.com/index.php?showtopic=94679 (No help)
http://forum.insanelymac.com/index.php?showtopic=66345 (Didn't work, although I am not trying to make it my main drive)
http://forum.insanelymac.com/index.php?showtopic=111140 (No help)

Can't be of much help, other than to suggest:

Check with 3Ware that the driver has been tested with whatever version of OS X you're using
Check System/Library/Extensions that the driver is ACTUALLY there (longshot, I know)
Contact 3Ware and just tell them you're using a Mac Pro

PS: I found this buried in 3Ware's KB:

"Although not officially supported, you can use the code from the 1.2.0.0 code set on the Mac OS X 10.5.3 Leopard and older.

Mac OS X 10.5.4 Leopard is not yet supported if using an Intel based Mac. Check this KB article for updates regarding future Mac OS X 10.5.4 Leopard support."

I did check that it was in there and even transferred it there myself. I will give them a call just to see what happens.

Could it be that my second PCI-E port is not being recognized by osx?

I've got the same problem with the AMCC 3ware sidecar - kext is installed but the controller isn't recognised by OS-X.
I have manually reinstalled he kext by using the OSX86 tool, but that didn't help either.
Any advice would be appreciated.