Need help using Seagate external hard drive with new Macbook Pro.
I have the new macbook pro operating OS X Yosemite 10.10.2. I am trying to use my seagate external hard drive but it is displaying "Read only" permissions. I was and have been using it fine with my old macbook (8 years old) which is operating on Mac OS X 10.6.8. On the old computer its "read and write". The format is Windows NT Filesystem.
How can I get this to work on my macbook pro? Do I need to reformat it?
Thanks.
MacBook Pro with Retina display, OS X Yosemite (10.10.2)