External hard drive not recognized to install
I have a MacBook from Dec 2008 that I've upgraded to OS X 10.8.4. I just purchased a WD My Passport external hard drive for Mac. It should just open the installation guide when plugged in but nothing happens. I turned off/on the computer, checked for missing updates, tried to manually install the hard drive utilities to no avail. The external hard drive makes a noise and the indicator light blinks when I plug it in the the USB cord (it's configured for 2.0 & 3.0) but nothing shows up on the computer. Does it have somthing to do with upgrading to Snow Leopard/Mountain Lion? Did some driver get lost along the way? The only solution I can think of is that the WD drive is defective, but I hope not. Help is much appreciated.
MacBook, OS X Mountain Lion (10.8.4), external hard drive not recognized