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I would suggest that you first check the S.M.A.R.T. values of the hard drive, either by booting from a live CD (e.g. Parted Magic) or if you have access to a Windows computer, putting the drive in an external enclosure and checking with tools like HD Tune or HD Sentinel. Amongst common errors, reallocated sectors will indicate the presence of bad sectors.


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The whole point of Internet Recovery is to allow reinstallation of the OS when all data on the internal storage is lost, including the Recovery partition. However, some people have had trouble with some models of Macs not connecting to Apple servers. It's certainly worthwhile making sure you've got an external bootable install media for emergencies. Also, ...


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couldn't fix this so I reformatted the drive and reinstalled and now I am in the middle of a Time Machine recovery.


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It is not possible and even if it were it would be a very bad idea. RAID 1 is to protect from hardware failure, and as described in the Apple document Create a disk set using Disk Utility on Mac mentioned by @user3439894 in comments, requires multiple disks (not partitions). Mirrored (RAID 1) set: Protect your data against hardware failure with a mirrored ...


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Disk Utility's RAID support is patchy at best. I recommend using SoftRaid. The 'Lite' version is sufficient for basic needs, and costs $50. https://www.softraid.com I use it on my G-RAID unit. I've replaced the drives once, and SoftRaid handled the re-population of each new drive in turn effortlessly.


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Cloning isn’t easy in my experience since you need to first learn a bit about specifics and how to select a proper clone tool tool and understand any filesystem differences between your exact versions of OS. Why not install a fresh OS on the SSD and then when it first starts migrate everything from the old OS? Apple tools handle this for you including all ...


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Ended up formatting the whole thing after doing a back-up


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You can do it easily using ASR command You have to scan your downloaded image via following command sudo /usr/sbin/asr imagescan --source ~/Downloads/macOSUpdCombo10.15.7.dmg After scan you have to run following coammand to restore the image into the USB. sudo /usr/sbin/asr restore --source <IMAGE_PATH> --target /Volumes/<VOLUME_NAME> --erase ...


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You can edit, add, and remove files on a Disk Image if it is formatted to be readable and writable, which is set at the creation of the Disk Image. This is a different concept than file permissions: File permissions allow you to read, i.e. mount, an entire Disk Image, or delete it in entirety (as a Disk Image itself is a single large file). How the Disk ...


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This might be a hardware error. Maybe try to install a different version of macos. Another option is that you Boot on an external drive and try to go from there.


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It's normal to not have a Macintosh HD volume and other volumes after you've erased the disk since the disk is now empty without an operating system installed. It's normal to have many little ‘disk image’ disks show up in diskutil list since that's how the Recovery environment works (diskutil list shows 20 disk partitions, I only know 3, what are the rest?). ...


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They aren’t two separate drives, they are two different partitions on the same drive. You need to repartition the drive so that there’s only one partition. If you issue the command: % diskutil partitionDisk /dev/diskX 1 GPT JHFS+ “New Name” 100% Will wipe the entire drive with a single partition using a GPT partition scheme and format it with the Journaled ...


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For a MacBook Pro there is a possibility. Assuming you are using the trackpad to click, it may be worth trying a wired USB mouse. Try on all USB ports just in case. Oddly enough older MacBooks have actual ADB bus pointing devices, long after Apple supported ADB as an available port. Not sure if this is one of those Macs but a curious historical note, none ...


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I copy the contents of the container to a new disk / volume and then evaluate if it's faster to erase the entire drive or I want to merge / rearrange things. The short answer is the tools are designed to have one container for the entire storage so you can move date between volumes without running into ordering issues. One container per drive is how I run ...


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