I have an iMac - Oct 2015, 27” 5K display, External OWC SSD, OS 11.5.1
About 6 months ago, the iMac’s internal HD, a 1 TB Fusion HDD - for lack of a more precise description - started acting “flaky” and I decided it was time to stop relying on it. I purchased an external OWC 500 GB SSD and all has been well since.
For the record, I also have an OWC Dual Dock Drive with two HDDs devoted to alternative TM backups.
I decided I might as well get some use out of that internal Fusion HDD so I shut down, detached the OWC SSD, booted up in Internet Recovery Mode and did my best to erase the Fusion HDD before reinstalling the macOS. This may have been a mistake.
Disk Utility Screenshots of that Fusion HDD.
That done, still in Recovery Mode, I went back to macOS utilities and chose Reinstall macOS.
macOS Sierra was what was offered - the macOS my iMac came with. I clicked on Continue, saw the drop-down noting Loading installation information, then Agree.
And here is where things stalled out. I got the macOS Sierra window and Select the disk you want to install macOS.
I waited and waited and waited but no disk was forthcoming and so I could not choose Continue to move forward.
If any one is having a quiet weekend and can offer any suggestions/see anything I have done wrong, I’d greatly appreciate your input.