You can now quit Terminal and eject the volume. When Terminal says that it's finished, the volume will have the same name as the installer you've downloaded, such as Install macOS Monterey.After the volume has been erased, you may see an alert stating that Terminal would like to access files on a removable volume.Terminal displays the progress as the volume is being erased.
When prompted, type Y to confirm that you want to erase the volume, then press Return.Terminal doesn't show any characters as you type. When prompted, type your administrator password.If the volume has a different name, replace MyVolume in the command with the name of your volume. Each command assumes that the installer is in your Applications folder and MyVolume is the name of the USB flash drive or other volume you're using. Type or paste one of the commands below into Terminal, then press Return to enter the command.Open Terminal, which is in the Utilities folder of your Applications folder.Plug in the USB flash drive or other volume that you're using for the bootable installer.When I go to boot from the flash drive, it start up normally for 30 seconds with the Apple logo and spinning loading wheel and then after 20-30 seconds it sounds as if the HDD just goes to sleep or turns off and immediately I get the little circle with the line through it. If the target Mac computer already had a macOS or OS X on it, then installing macOS from USB is straightforward and this is called the normal way. I just got a new HDD put in 3 days ago directly from apple. Geez.Įdit 3: I read some people saying the drive has failed then and needs to be replaced. I also cannot install lion from my account, it says my HDD is locked. I cannot close applications or files because I have no access to the OS. Once Secure Boot is off, go to the Boot Menu and select the boot device from the menu. Secure Boot makes sure that your computer only boots firmware that the manufacturer trusts. You'll be presented with the OS X Startup Manager, listing all bootable devices attached to your Mac. When your Mac's screen turns off, hold down the Option key while your Mac reboots. When I try to unmount the harddrive to erase, it says unmount failed: make sure all applications and files are closed. When starting from a USB drive, disabling Secure Boot is the first step. To use the bootable flash drive as an OS X Lion installer: Insert the USB flash drive into one of your Mac's USB ports. It seems like it's working and then just boots to Lion Recovery where I cannot not fix anything in Disk Utility.
I don't know what to do!Įdit: I am in the recovery partition of Lion right now and my Snow Leopard retail disk keeps getting spit out of my optical drive that was just serviced by Apple.Įdit 2: I even tried moving OS X leopard from the thumb drive to the HDD with restore. Prepare a USB Flash Drive (Must be 8Gb or larger) Plug the USB Drive in to your Mac and open Disk Utility (found under applications / utilities in finder). I am so frustrated right now, I am sorry if I come off blunt I am extremely grateful for the help. I cannot go into the OS becuase no OS is loaded. It tells me that it couldn't be unmounted.
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