Using Windows NTFS filesystems on Macintosh computers; Both are commercial products made by Paragon. See their homepages for: HFS+ for Windows® 10; NTFS for Mac® 14; I'm not affiliated with Paragon. I just bought a Seagate drive to use on a Mac I just acquired though I've always had Windows machines.
'Using a Mac is a wonderful experience – until you try to use a NTFS-formatted drive' I believe that your external hard drive is currently NTFS formatted. Sadly, macOS doesn't natively provide write access to NTFS formatted media. You have to resort to 3rd party drivers to get write access to their media. There are at least two commercial NTFS drivers available:. However, for your drive, Seagate seems to offer a NTFS driver free of charge:. Download and install this driver on your Mac. It should give you write access to your NTFS formatted hard drive without reformatting.
It seems there is no easy 'thumb-drive-like' way to use a hard disk to switch between Mac and Windows machines. I finally had to reformat the unit and will use it with the Mac only. There are in fact, several OEM SW products to enable the function but most seem to require technical expertise that goes beyond what I want to get into and have no integrity guarantee.
![Windows Windows](/uploads/1/2/5/3/125356058/189342379.jpg)
I will probably use a 32 GB SD card as Exchange media between machines. Still can't uncerstand why isn't it posible to work with hard disks as well as I work with SD cards or thumb drives. And, BTW Seagate should not put the misleading legend on their disk boxes, it must explain the 'between' works only in read only mode.