I want to connect a Seagate external hard drive to my Airport Extreme usb port but I don't have a Mac computer to format it using the required Mac OS Extended file system.
Is there a way to do this on Windows or Linux?
OS X uses the Hierarchical File System Plus (HFS+), aka Mac OS Extended filesystem. GParted can manage HFS+ partitions, but you've got to have some other packages installed in Linux for this to work: hfsplus, hfsprogs and hfsutils.
You can easily install all of these packages on an Ubuntu live USB without writing anything to your computer's hard drive.