Here's my story, was running Catalina on an 2013 iMac and it became really sluggish responding, couldn't force quit anything so I tried all the usual stuff (restarting, disk utility, safe mode and then it started not even finding the OS (strikethrough logo)
I tried internet recovery mode, which seems to be using a Mountain Lion set of utilities and ran Disk Utility from there and when I saw the drives all listed in Red I thought I was onto something and could repair these and maybe be on my way..
Unfortunately I was informed on a different thread that this is because this old version of Disk Utility doesn't recognize the new architecture of the hard drive that OS started using differently after High Sierra (correct any of this if you know better) and so it's basically staring at something from the future and not knowing what to make of it.
I'd tried to do the 'fix' but I was just left with a stalled blue progress bar and a spinning wheel - I quit out of that and now when I start it I just get folder with a question mark.
Today I tried target disk mode using Thunderbolt connections from a 2019 MBP (type 3 Thndrblt) to the iMac (type 2 Thndrblt) but couldn't get it to mount at all even though the iMac was displaying a lightning icon..
Just to update this now with everything - I finally managed to install Catalina from a flash drive but at the price of deleting / losing reference to all of my previous data.
I've tried everything I know about, I've just tried 'Disk Drill' which is just some app off the internet but that couldn't even see anything that isn't viewable in the finder anyways.. so I'm wondering if it's all gone.
I got in touch with Drive Savers - they will take it in and look at it for free and you don't have to pay up unless they recover what you asked for but it's gonna be 3+ grand if they do find and recover stuff..
I tried internet recovery mode, which seems to be using a Mountain Lion set of utilities and ran Disk Utility from there and when I saw the drives all listed in Red I thought I was onto something and could repair these and maybe be on my way..
Unfortunately I was informed on a different thread that this is because this old version of Disk Utility doesn't recognize the new architecture of the hard drive that OS started using differently after High Sierra (correct any of this if you know better) and so it's basically staring at something from the future and not knowing what to make of it.
I'd tried to do the 'fix' but I was just left with a stalled blue progress bar and a spinning wheel - I quit out of that and now when I start it I just get folder with a question mark.
Today I tried target disk mode using Thunderbolt connections from a 2019 MBP (type 3 Thndrblt) to the iMac (type 2 Thndrblt) but couldn't get it to mount at all even though the iMac was displaying a lightning icon..
Just to update this now with everything - I finally managed to install Catalina from a flash drive but at the price of deleting / losing reference to all of my previous data.
I've tried everything I know about, I've just tried 'Disk Drill' which is just some app off the internet but that couldn't even see anything that isn't viewable in the finder anyways.. so I'm wondering if it's all gone.
I got in touch with Drive Savers - they will take it in and look at it for free and you don't have to pay up unless they recover what you asked for but it's gonna be 3+ grand if they do find and recover stuff..
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