Okay, so I got it running. The trick in my case was to start it with the “Option” key method. Put the external drive with the backup, or a thumb drive with the image into the USB port and start the machine while holding the option key and proceed from there. Walked through the steps to partition and mount the drive and then load it with the operating system. Takes a while but worked a treat. Then after the operating system was happy I used Time Machine to get everything from the old drive transferred to the new drive. Also down loaded “Macs Fan Control” to calm the furious fan.
Hope this helps someone
My iMac …mid year 2010, 2389. I had a failed Seagate Barracuda, 7200.12 , 500 Gbyte. I installed a Toshiba 1TB 7200 drive. Now the computer starts (chime sounds) and I get a ? . I plugged in my backup Seagate and the computer see it but restoring with time machine fails. I started the computer in Internet recovery mode and it attempts to load the OS but when I get to the window where it asks what drive to load it to, it doesn’t see a hard drive. Regarding the fan, it seems to work correctly as far as I can tell. It starts off running slowly and as the machine runs longer the fan speeds up.
So can someone tell me what to do to get the computer to “see” the new drive? ( I selected this drive from the iFixit suggested list of drives.)
Computer doesn’t see the new hard drive. Mid year 2010 iMac, #2389. Removed Seagate Barracuda 7200 500 gig drive. Installed Toshiba 7200, 1tb drive. Computer starts, screen lights but I get a ?. So I started in recovery mode but it doesn’t see a hard drive to load to. I have an external backup and it dies see that drive. Tried reinstalling the os over the internet but when it looks for a hard drive it doesn’t see one. The fan is running…starts off slowly but as timne goes by it gradyally speeds up.
Any help is apprecioated