The hard drive is formatted in NTFS format by default, not in exFAT. However, you can easily reformat it to exFAT yourself in order to use it with Mac and Windows.

exFAT is the ideal format for your requirements as it is supported by both operating systems and allows files larger than 4 GB. On the Mac, you can perform the formatting using the hard disk utility, on Windows using the Explorer with a right-click on the hard disk and the formatting option. After reformatting to exFAT, you can use the hard drive with both systems without any problems.