I followed the directions here:
NTFS-3G via Homebrew installation
If you have [Homebrew][5], installing NTFS support is as easy as running the following in a terminal:
brew install ntfs-3g
Then, follow the instructions on the screen. Homebrew will tell you how to replace the default OS X automounter so external NTFS drives are mounted using the new driver. Those are a couple of commands you need to run through your terminal.
And it worked perfectly at first, but a couple days later now and when I insert a USB drive that worked before, it is mounting as read-only.
How can I get NTFS-3g working again? I tried reinstalling the homebrew, but it stated that it was already installed and did nothing. Should I uninstall and reinstall, if so, how do you uninstall a homebrew item?
brew remove ntfs-3g
and then install again. No need to completely remove Homebrew though. Make sure you follow the instructions where you have to copy a file over—this is needed to have OS X automatically mount drives in write-mode.