So, to erase a disk and create a brand new disk, you need to run this (based on this):ĭiskutil eraseDisk JHFS+ GPT ĭiskutil apfs convert Well as it seems even when you create a new APFS file system, it first creates HFS+ blank volume and converts it to APFS.
But I should be able to test things out in a disk image by Thursday from a friend's computer (though it will likely be in booted macOS not recovery mode). I am not as familiar with diskutil commands and I don't have a Mac anymore. Otherwise, you would need to verify the OS installer by checking the checksum from here But, if you made the installer by downloading the installer from macOS or from here. I deleted that installer partition (using Linux utility) to try to remake it the same format as the partition where the OS will install.Įdited by ray5450, 31 October 2021 - 01:12 AM.Īs far as I know about recovery servers not being contacted, this could be due to the date or time not being correct.
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*In a previous post, I said that I already made a partition for the installer and it started to install until it needs a place to install. I need another clue(s) to make these 2 partitions. Here is the result: "Error: 69888: Couldn't unmount disk" The installer needs 6 gb, so I tried: diskutil partitionDisk /dev/disk0 HFS+ OS 6g Here is the result: "Ob does not appear to be a valid disk size" Using that example, I tried: diskutil partitionDisk /dev/disk0 GPT HFS+ OS Ob (Regarding all those unspecified partitions shown by the command line, I checked the disk using Linux and it only shows one partition, the recovery partition, and the rest says unallocated space, so I'll go with that.)ĭiskutil partitionDisk /dev/disk2 GPT JHFS+ New 0b I still need to format the space to install the installer.* The ReInstall option results in, "The recovery server could not be contacted".and yes, wifi is on and connected. Those instructions include what I already tried.
Thanks, for all your responses and information. I tested it using a 3rd party disk utility and indeed, the iso install wants to install the OS, but I think the partition for OS needs to be created and formatted with the Mac utility as it does not recognize the other.ĭoes that mean you are using from an external installer (DVD or USB flash drive)? Also, which 3rd party tool did you test the disk with?Įdited by Chiragroop, 30 October 2021 - 02:21 AM. I read that an iso OS install can be "restored" to a partition on the hard drive, and then booted to restore OS. Let us know if you can identify the Mac model or the OS version. See if you can recognize it from this list: In addition, the install Mac OS X/OS X/macOS might have an icon right by it. If you don't know the Mac model, when you boot into Recovery Mode, it would describe the what OS it installs as either of the 3:
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(There are 18 of these untitled partitions/segments of various sizes)Īlthough High Sierra came out in 2017, you could upgrade many Macs from 2009-2010 to High Sierra. dev/disk2 (disk image) TYPE NAME untitled SIZE 5.2 MB IDENTIFIER disk2 I'll type out one of the diskutil list items: On all sites I tried, it says, "localized string not found": Before you posted, as a test, I tried erasing one of the partitions (using ithinkdiff link above) but it said, "eraseVolume: command not found". I thought maybe I could create a new partition using this new information, and then erase and add all these other partitions to it. Otherwise, the format is the same as the video. It is older than that.įrom the video, I see that a header "type" is there, but on this one, the data for it is blank. I looked up High Sierra and it cannot be that one because its date is too new. It is my mother's machine and she knows hardly anything about computers.