What Filesystem should I use for an external USB harddrive (500GB), with possibility to share with a Mac and Windows systems, for example at the office. Now it is NTFS but back in the day the NTFS support was not stable under Linux and I think it is not supported on a Mac. I would just use FAT32, but it has 4GB file size limitation, do I overlooked any other option?

I looked here: but a Mac is not mentioned. Edit Windows is the least important, I am not sure if I need Windows support at all. So what would I use just for Linux and Mac? Edit I am not so happy with the performance, I don't know if the problem lie in NTFS USB or whatever, but the process mount.ntfs has a high CPU usage while copying.

If u have to transfer stuff from MAC to PC and if both the machines are accessible, install samba on MAC and connect MAC and Windows through a network. Install this: Samba for Mac enable the folders which u want to share open windows,network and u'll see the MAC there witht the shared folder. Games download for mac.