I bought this as a backup drive for my Mac G4 (running 10.4.11). The spec on the Western Digital site claims that it supports Tiger and is backwards-compatible with USB 1.1. The box even claimed that it supports Panther..? Talk about facts not being straight! I couldn't get my MDD Mac to even recognise it. It would show up tantalisingly in Disk Utility but when I tried to format it - "Input/output error".
So, I scoured the web for info and other owners were having the same problem and had got the drive to work by messing with how it was partitioned (i.e. swapping to an Apple Partition Map). Not for me. I tried taking it out of my USB hub and plugging it directly into my USB port. Again, no joy. I tried these steps on two different drives.
In the end I returned both drives (all credit to Amazon for their enormously efficient returns policy) and opted for the more expensive MyBook Studio 1TB (again by WD). Works perfectly. This is a very cheap 1TB drive (I fell for the price!) so please be aware that it may not work with your Mac. Get more detail about Western Digital Elements 1TB USB 2.0 External Hard Drive - Black.
