The following outlines today’s activity and provides some possibly relevant data: # (update OS X from Snow Leopard to El Capitan) Somehow I managed to miss the point in time at which Mac installation deleted the original 368G ESP, created a 200G new ESP, shrunk the original sda2 for the OS X system, and added a small recovery partition sda3 in between the HFS system and HFS data partitions, which moved the HFS data from sda3 to sda4, and shuffled up the Linux partitions. Originally I gave half the disk to OS X & half to openSUSE, 3 partitions each, making swap sda4, root sda5 and home sda6. I found someone to take it to to use with his own Apple ID to download the necessary latest upgrade image file, El Capitan 10.11.6. I succeeded in multibooting via rEFInd, then the project sat for about 9 months. Upgrading it beyond 10.6.8 proved an impossible task, mainly due to inability to create an Apple ID account by any means at my disposal. Once satisfied how 15.0 was working I installed from the only Apple media I had access to, Snow Leopard 10.6.3. At that time I partitioned what I expected to be fully on a new HD, then installed 15.0 on the 24" iMac. If Windows or Linux has a problem, then you likely have a defective USB stick.I used last summer only in part. If none of this works, then try using Windows or Linux to erase the drive. If this doesn't work, then try writing zeroes to the beginning of the drive like this (again substitute the correct drive identifier in place of "disk2" in my example): sudo dd if=/dev/zero of=/dev/disk2 bs=50m count=10 MacOS can also have trouble recognizing and erasing drives when the partition or file system gets into a weird state so you may want to try the "partitionDisk" option instead (make sure to change the "disk2" part to the actual drive identifier for the USB drive you want to erase): diskutil partitionDisk disk2 1 GPT jhfs+ Backup R Disconnect all other devices from the Mac in case one of them is interfering with the operation of the USB drive causing it to disconnect. It is possible an adapter/dongle or hub could be causing a problem. If this is being created on a laptop, then make sure to use the charger and try connecting the USB drive directly to the computer. The quality of USB sticks is quite poor so you may want to try using another USB stick (even a spare external drive will work). 100%Įrror: Error Domain=NSCocoaErrorDomain Code=512 "“SharedSupport.dmg” couldn’t be copied to “SharedSupport”." UserInfo=The copy of the installer app failed. If you wish to continue type (Y) then press return: YĮrasing disk: 0%. To continue we need to erase the volume at /Volumes/target. Sudo /Applications/Install\ macOS\ Monterey.app/Contents/Resources/createinstallmedia -volume /Volumes/target I have gotten the same error twice, the log from the Terminal is: Creation of bootable USB drive for OS install failing Following the instructions in I tried to create a bootable USB drive to re-install Monterey once I reformat my hard drive.
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