Ok, I am at my wit's end. Last week after 10.13.3 failed to install twice, my late 2014 5K Retina iMac became painfully slow. Eventually it just bricked. I tried to restore from Time Capsule over ethernet but it would get to around 28% and slow to a crawl. Like 200 hours crawl.
After numerous attempts at this I bailed and tried reinstalling the OS. No dice there, it would just stall at the startup screen.
Next I installed macOS to an external drive and then using SuperDuper tried cloning it back to the iMac. This worked and I ran Migration Assistant which looked promising but again, stalled around 1/3 through.
Canceled that and now when I go into Disk Utility I see this for the internal drive:
- APPLE SSD SD0128F Media (Solid State) 121GB
- Macintosh HD (CoreStorage Logical Volume) 120GB
The Fusion drive is supposed to be 3.11TB, I seem to have lost almost all my storage space.
I suspect this is why all my efforts to restore have failed, it gets to the new available capacity of 120GB or 240GB and doesn't know what to do.
I have not been able to find a solution to reclaiming the 3.11TB and recreating the Fusion drive, am I out of luck here and just need to bite the bullet and go to an Apple Store?