hi Pauleduc,
It is possible that you have come across a limitation of your system. You may want to check your specific model with Apple and see what size of hard drives it can support. It shouldn’t have to do with the utility that you are using to format the disk. Disk Utility should do the job fine, just make sure that you are formatting it with HFS and you have it set is GPT/GUID partition table instead of FAT/MBR.
