In other times, it suddenly became read-only after you have been using it for a while. Sometimes, the WD external hard drive is read-only on Mac when you just got a brand new WD external hard drive. Please continue reading and look for solutions for solving read-only WD My Passport on Mac problem. I'm extremely frustrated because this drive is in a read-only mode, and I can't figure out how to change it! Any suggestion to fix this?' 'I have a WD My Passport 320GB external hard drive that I am trying to hook up to my iMac for the first time.
