Can I use my iPod on both my Mac and Windows computers?

Yes.

The easiest way to use an iPod on both Mac and Windows computers is to format the iPod (using iPod Updater) using the PC.  This will force your iPod to use the Windows file system (FAT32) which both the Mac and PC can read from and write to without the help of additional software.

If you need to use a Mac (HFS+) formatted iPod on a Windows PC, you’ll need to install XPlay 2.2 (or at least MacDrive) from MediaFour Software.  This will enable your Windows PC to read Mac-formatted disks.

Related posts:

1. What are the differences between the 3G iPod for Macs and iPod for Windows?
2. iPod no longer plays music after formatting or partitioning the hard disk
3. Can I use my Windows formatted iPod on a Mac computer?
4. How do I format a used iPod shuffle for use on a Mac?
5. Can I use my Mac formatted iPod on a Windows PC?