I have a WD 4TB Black hard drive that I pulled from my Mac Pro and am trying to use it in the PowerMac G5. Unfortunately, the disk won't mount. Here's the message. I cannot run repair disk as all buttons are greyed out. It was initially formatted in OS X Lion and showed up as a Logical Volume. There is data on the disk so formatting it is not an option (unless, I stick it elsewhere, clone it, format it in the G5 and clone it back). How can you use 4TB drives in Leopard?