Transplanted HDD not recognised by Disk Utility
I am fixing my friends mac by installing my old HDD from my dead mac. I replaced his dead drive with mine and I started up. The infamous question mark came up and i opend OS X Utilities. When i entered. I could only find so-called disk0 (I think this is internal) but not my HDD from my old mac. I know the HDD functions as my PC recognised it when i hooked it up. What should I do?
Is this a good question?