

I've used at least 10 other hard drives (conventional HDs not SSDs) formatted in ExFAT and they've always worked across Windows and Mac with full read-write functionality.

I formatted it again in ExFAT on Mac, then when connected to Windows it comes up as read only - the drive can be read but no data can be added or changed, it can only be written to on Mac. However, with OS X update 10.6.5, Apple fully supports accessing exFAT drives. However, previously Apple OS X users have had difficulty accessing exFAT drives. As previously discussed in our exFAT versus FAT32 versus NTFS article, exFAT is a good modern update to Microsoft's file system.

I can confirm that after I re-formated my external 2 TB HDD from exFAT with 2048K allocation unit size to exFAT with 1024K allocation unit size, the disk is now discoverable by Mac OS and I can work with it just fine. By Juno | Posted to NTFS for Mac Tips, updated on November 18th, 2020
