I was just given an old iMac without a Hard Drive.
This is the model (image from the software Mactracker):
It only gives the following details about the hard drive:
320, 500, 750 GB, or 1 TB 7200-rpm
However, when I consulted ifixit to see how I could replace the hard drive, and clicked on the suggested replacement hard drive, some instructions said:
Important: To ensure compatibility with the 2009 and 2010 21.5" or 27" iMac, the replacement hard drive must be of the same brand as the original. The model number of the hard drive does not matter as long as the brand matches. 2011 and up iMacs cannot be supported by us.
Which doesn't help since I have the 2008 model. I am also not sure whether a 2.5 or 3.5 hard drive is required. The "About this Mac" menus are not available since the computer doesn't power on. I don't know what the RAM is (2.8 or 3.06).
What is the exact reference for a compatible model for this iMac Early 2008?