I bought this product for my use on both my MacBook Pro and iMac because I was running out of space on my MacBook Pro, I did a lot of research before hand and decided that this was the best of the bunch. When it arrived I plugged it into my iMac, but nothing happened, I was confused and then I released that because I have Lion it needed to be updated and formated, Mac owners will know what I'm talking about.
I also have a Windows PC so I needed to make sure that the format was compatible with both Mac and Windows, it does sound complicated and it may put you off buying but please don't let it as the steps really are very simple.
Click on the website below and it will give you step by step instructions, follow them and you can't go wrong.
You can format your external hard disk for Mac and Windows. To format hard disk that usable for Mac and Windows, you need to select "MS DOS File System" for formating your hard disk.
To format your hard disk for Mac and Windows on Mac follow the steps below:-
Go to Finder -> Application -> Utilities
Double click for Disk Utility
Select the external Hard Disk you wish to format at the left column (LaCie 500GB)
Click on the Erase tab
At the "Volume Format" select "MS-DOS File System"
If you confirm to format your hard disk for mac and windows, Click on "Erase" button.
Pop up window will ask to verify the erase procedure. Click the erase button again in the window to start the erase process.
* All the data in the external hard disk will be permanently removed after this steps.
Once the erase process finish, your external hard disk may be able to use in Mac and Windows.
You will now have a wonderful product that will work on both Mac and Windows PCs.