![]() ![]() You can now quit Terminal and eject the volume. When Terminal says it’s done, the volume will have the same name as the installer you downloaded, such as Install macOS Ventura.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. Now, run the virtual machine and then when it asks to select the OS file, navigate to where the ISO/DMG file is. Here, set up the virtual machine that is going to host mac OS Mojave 10.13. Now, open the virtual machine tool that you intend to use. When prompted, type your administrator password. Download the ISO/ DMG file of the Mac OS Mojave 10.13 on your computer.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.If you have a USB drive that needs to be fixed, find out how to fix unformattable USB drives. In fact, you have a couple of ways to do this: either using Disk Utility to format the drive before installing macOS or cloning your drive using a third-party tool. macOS users can also install the OS onto a USB drive and work with the same installation that’s on your internal (and faster) drive. Linux users know that booting from a USB drive is a useful way to get into the OS. In short, we don’t recommend it, and it’s likely not supported. We also don’t know whether you’ll experience issues if you look to install an older OS you don’t own. ![]() ![]() Though, if your Mac is based on Apple Silicon, you may find incompatibilities. In theory, there’s no reason why you couldn’t boot an older version of macOS, and Apple does offer ways to install older versions on a USB. Can I boot older versions of macOS from a USB drive? Our testing gave us no issues when using a USB 2.0 to USB-C connector, so you’re able to press your older USB drives into service. Am I able to use a USB connection other than USB-C? We recommend 16GB to give yourself enough “wiggle room” when it comes to the installation process. As such, you’ll need a large enough USB drive to store Big Sur. I tried to finish it in internet recovery mode without success, couldn't even do a backup. This is what happened: After doing the Update, the Mac wouldn't start up anymore (stating 'couldn't install Catalina'). In our experience, you will not be able to do this. 1 I'm having a very hard time repairing a broken Mojave->Catalina update on a MacBook Pro from 2015 for a friend of mine. Can I split an installation across multiple USB drives? Disk operations on the boot drive can be performed safely from a USB stick as well. You can now run the operating system as normal and use this USB drive to boot up your Mac. If you’re using an Apple Silicon machine, you’ll need to insert the USB drive, shut the Mac down, then reboot and hold the Power key until you come to the Startup Manager.įor Intel Macs, restart and hold the Option key to enter into the boot selection dialog.įor both types of machines, use your keyboard’s arrow keys to select the USB drive from the list of bootable devices, click to confirm, and your USB drive will begin to boot. You could also use the Startup Manager to select your boot drive when you start macOS. ![]() Your Mac will reboot from the USB instead of your default startup disk. ![]()
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