Question: My Seagate Backup Plus Slim disk box states it can be used with both Windows and Mac. It worked fine with the Power Mac and also with the Windows machine. However, after I used it on a Windows machine, it appears as Read Only on the Mac. Other than formatting, what can I do to regain write capability with the Mac? I would like to use the disk to move files back and forth between the Windows and Mac machines.
Answer: “Using a Mac is a wonderful experience �C 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.