Super @TheShortTimer, thank you, I will try that tomorrow straight away 
Hello @TheShortTimer - I have followed your instructions and it does not work...burn the DMG to create an actual install CD/DVD and then mount the disc so it's visible in Finder and/or Disk Utility, plug in the USB stick and then in Disk Utility, click onto the USB stick, select Edit from the Disk Utility menu and choose Restore
You also need to make sure the Partition Scheme is Apple Partition Map, GUID/MBR is for intel Macs and some very late PowerPC Macs. Newer versions of macOS do not support partitioning drives as APM AFAIK.
I'd just burn the DMG file itself to a DVD-DL using Disk Utility, that way you do not have to bother with Partition Schemes and what-not.
Hello, again, thank you so much for your help and again, nothing works after reading your advice.I think I see where you're going wrong.
You're choosing the drive itself instead of the mounted DVD. You need to select the "Mac OS X Install DVD" in your list of externals when it asks you which volume you want to restore.![]()
Go to System Preferences > Startup Disk and select the hard drive to boot from. Yes, it’s that simple.If someone knows how to fix this question mark face issue, would be great. I assume there is another issue with this G5 iSight.
Go to System Preferences > Startup Disk and select the hard drive to boot from. Yes, it’s that simple.![]()
Hi, Thanks for your great advice...Yes, unf. I tried that so so many times here on my iMac (Retina 5K, 27-inch, Mid 2015) and nothing works at all. I definitely will purchase a FireWire cable. Thanks again for your help!!!I'm delighted that you've managed to get it working. I don't understand why you had problems with Disk Utility as this has been reliable for me. Next time use a FireWire cable with Carbon Copy Cloner and connect both machines together. This will save you needing to remove/swap the hard drives.
Congrats.![]()
Thunderbolt to FireWire 800???What will you do with a Firewire cable on a Mid 2015 iMac?
No Firewire on iMacs since 2011 models.
What will you do with a Firewire cable on a Mid 2015 iMac?
No Firewire on iMacs since 2011 models.