I then went to my other Mac (2018 4 thunderbolt version) and copied the OS Catalina Installer onto a flash drive hoping that I would be prompted to install OS Catalina in the broken MacBook. I went back into disk utility to find no available hard drive ( other than the Mac OS base system drive).

When I attempted to download Maverick, there was no hard drive/disk available to install the OS on. I then restarted in recovery mode and was prompted with the option to open disc utility or download a version of Mac OS Maverick via the internet. Upon restarting my computer, an image with a folder and a question-mark appeared. One was titled Macintosh HD and the other was Macintosh HD - DATA. I was clearing my early 2015 MacBook Pro 13' Retina, planning to sell it afterwards. Two GUID Partitions: Untitled (443GB) and MacOS-Clone (556GB)Įrased main HDD off device and now no hard drive can be found. If you want more tech details, some appear below. I'm thinking I will need to erase the entire machine and start with a fresh install of El Capitan (the last OS that worked properly).Īny thoughts are welcome. I have a Time Machine backup from the old MacOS but no drive to restore it to, unless I overwrite my MacOS-Clone. The 'new' disk is named Apple SSD SM0128G Media, an Untitled 121.33 GB PCI Internal Physical Disk. Apple HDD has two partitions: MacOS-Clone and Untitled (formerly my MacOS/startup disk and hopefully my Big Sur partition).

But the MacOS-Clone partition started up - not my previously designated startup disk.ĭisk Utility reports that I now have two drives in the machine: Apple HDD (disk1) and Apple SSD (disk0).

I rebooted in Recovery mode and ran Disk Utility no errors.

The drive rebooted several times before I saw the prohibitory symbol (circle w/ line through it). The Big Sur install on the MacOS partition failed at the dreaded 'one minute remaining' mark. My 1TB SATA HDD is partitioned in half: MacOS and MacOS-Clone (I cloned my El Capitan install and data so I can run legacy software). 60 GB of free space on the target partition, but the install failed and Disk Utility now shows I have both an HDD and an SSD drive. OS Upgrade Failed Disk Utility Shows an SSD and won't boot I'm updating my Mac mini (Late 2014, 1TB HDD) from OS X El Capitan to Big Sur.

Mac disk copy utility