Prior to installing macOS 10.12.5 I had enabled reading AND writing my Bootcamp partition (formatted NTFS) with terminal. For those who aren't familiar sudo nano /etc/fstab [ENTER] LABEL=BOOTCAMP none ntfs rw,auto,nobrowse [control-o] [ENTER] [control-x] [ENTER] Then use "open /Volumes" to view Bootcamp and you have read/write support. This had worked flawlessly for multiple Sierra iterations. Last night I updated to 10.12.5. Afterwards, the Bootcamp partition was unable to mount while I was booted to macOS. If I held option down during start up, I was able to select Windows and successfully boot. While running macOS, I opened Disk Utility, the BootCamp partition was greyed out and I was unable to mount from there. The issue persists in a guest user. When I booted to the recovery partition I saw that copy of Disk Utility could mount it. Thats when I decided to fire up /etc/fstab again and disable read/write to Bootcamp. After restart, the Bootcamp partition successfully mounted as read only. Now here is where I'm stuck, I'm trying to re-enable read/write to Bootcamp and the terminal command no longer appears to be working. I'm trying to be able to confirm that either 10.12.5 disables this functionality or maybe I'm just doing something wrong. Anyone else in the same or a similar issue? I realize this is a very niche issue, the amount of Bootcamp users is small, and the amount of people using this method to read/write NTFS is even smaller, and then those that do that also have updated to 10.12.5 makes the amount of people in my situation probably really really small. Any support would be appreciated.