Mid 2009 iMac issue
I just turned on my cousins computer, and it’s a mid 2009 iMac. It’s not compatible with the high Sierra upgrade. If I upgrade the hard drive, is it possible to upgrade to high Sierra? Or am I just screwed?
I don't believe it's a harddisk issue
Upgrading the hard drive does not change the fact that
the rest of the hardware is not compatible with High Sierra.
Mid 2009 iMac issue