Hard drive read only access with Mac I have an external usb hard drive that I used to connect on my old PC laptop. There are some files I created with the laptop on this hard drive.

Now, I can only read those files with my Mac notebook 
I can't write any file on the hard dirve.

How can I enable write access on my hard drive ?
You need to install 3rd-party software for this, by default OS X just support reading NTFS, not writing.

Download and install MacFUSE and NTFS-3G.