These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.
Aug 11, 2021 10 Fixes for USB Not Showing Up on Mac. The reasons behind the problem of a USB device not showing up are various, including the USB port is not working, USB drive corruption, virus infection, macOS faulty, etc. So, to figure out the effective solutions for your own case, you need to take time to have some basic check, exclude the irrelevant. The solution is to go into the firmware set up and select “Legacy Boot” which then give you the option to boot from USB. True, and that will work. But to reboot to the hard drive’s OS you have to change the BIOS back. Kindof a pain to keep doing and redoing. True, and that will work. Connect a USB drive with a minimum of 16GB storage on it to your Mac and wait for the Disk Utility to appear on the screen. This is where you format the drive, preparing it for the Monterey installation: Choose GUID Partition Map and Mac OS X Extended (Journaled). Then, change the name to “Installer” and click Erase.
Create Linux Mint Bootable USB on Windows PC. Windows is the most popular desktop OS and there are many apps that are capable of creating bootable Linux Mint USB installer. In this section, we pick up the best three one based on our testing. UUByte LiteBoot. There are a lot of Windows users that are planning to give a try on Linux Mint. Much like prior versions of Mac OS, you can easily create a bootable install drive for MacOS Mojave 10.14. These boot install drives allow for things like easily formatting a Mac to perform a clean install of macOS Mojave, installing macOS Mojave onto multiple Macs without them each having to download the installer, or even as a troubleshooting tool since it can be booted from by any. I have successfully created a macOS Mojave bootable USB from macOS. Then I thought I should back up the partition of the macOS installer and share it with everyone who wants to use it from Windows. I have created two partition image files, the first is Clover Bootloader and the second one is macOS installer.
Unfortunately, the USB would be bootable if just simply copying the dmg file to USB drive without additional actions because the booting code is not written to USB via file copy. Instead, you should use third-party software to help you create a macOS Mojave USB drive from DMG file. To create macOS High Sierra bootable USB Installer, you need to have a Macbook or iMac but don’t worry because we have covered you. Now you can easily create a bootable USB installer for macOS High Sierra on Windows 10, 8 or 7 using the dmg that we have provided.
MyVolumein these commands with the name of your volume.
* If your Mac is using macOS Sierra or earlier, include the
--applicationpath argument and installer path, similar to the way this is done in the command for El Capitan.
After typing the command:
Yto confirm that you want to erase the volume, then press Return. Terminal shows the progress as the volume is erased.
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:
For more information about the
createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter the appropriate path in Terminal:
A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model.Comments are closed.
I'm a bit confused by your post on what you are trying to do here. Are you trying to boot into Recovery Mode to install macOS to an external USB drive or are you trying to boot from a macOS USB installer to install macOS to the internal drive?
Here are the instructions for creating a bootable macOS USB installer:
Make sure to carefully read the section regarding macOS 10.11 as there are extra steps required to extract the real installer from the downloaded .dmg archive to the Applications folder. After running the .pkg file from the mounted .dmg file you can then proceed to use the command line to create the bootable macOS USB installer itself.
Macs are very picky about the drives used for booting a Mac plus the quality of many USB sticks is extremely poor so try using another USB stick especially a different brand.
When erasing the drive make sure to select the whole physical drive within Disk Utility and erase the physical drive as GUID partition and MacOS Extended (Journaled). The physical drive should be the top most item which is usually identified by the make & model of the drive itself.
Aug 21, 2021 12:52 PM