Quickly mount a NTFS disk read/write on all recent OS X (including Yosemite, El Capitan):

  1. Open Application -> Utilities -> Terminal
  2. Type mount and look for the line with your disk. It will show something like: /dev/disk3s1 on /Volumes/MyDisk (ntfs, local, noowners, nobrowse)
  3. Type the following in the Terminal, replacing /dev/diskXsX with your disk as shown in the mount command:

To make this change permanent run the following (correct for El Capitan):

  1. Run the following command, changing /dev/diskXsX to your disk:
  2. Run sudo vifs and paste in the output from the previous 2 lines. To do this press down to go to the bottom of the file, A to start adding text, paste in the 2 lines then press escapeand :wq to write the file. (vifs is the only safe way to edit the fstab in OS X).
  3. Run the following to mount the disk

Note: The device will no longer automatically open a window when you attach it. To access it open a Finder window and select the Go -> Go to Folder to /Volumes