dev/disk) Replacing with the disk number of your USB drive, type. (make note of which disk is your USB drive I.E. Open a Terminal, type the following and then press Enter.
Install media now available at "/Volumes/Install macOS Big Sur" Boot a USB Flash Drive in VirtualBox (Mac OS X) Download and install VirtualBox for OS X Hosts via the.
Make a note of the mount point because we’ll use it in the command to create the installation media. Click on the new SanDisk volume and you will see it has a mount point of /Volumes/SanDisk.When the Erase is complete, click Done.Give the disk a name of SanDisk, select MacOS Extended (Journaled), GUID Partition Map then click Erase.Connect the USB Flash Drive to your Mac, open the Disk Utility app, right click on the SanDisk USB Flash Drive then click Erase….Now that you’ve got your hands on a USB Flash Drive and a USB-C to USB Adapter, let’s copy the macOS installer to the drive and make it bootable by following the steps below. You can do this using the command line by following the instructions in this tutorial. You will also need to download the macOS Big Sur installer app to your Applications folder. If you’re using a Mac that doesn’t contain USB ports, you might also need an If you don’t have a spare USB Flash Drive, I recommend getting aġ6 GB SanDisk Ultra Fit from Amazon * because they are fast, reliable and have a micro form factor.
Once pasted and corrected, press enter, then enter your password for macOS. The USB Flash Drive will need to be wiped so don’t use a drive with existing data because you will lose it. Make sure to change the element titled 'USBdrive' for the name of the drive you intend to become the bootable installer. You will need a USB Flash drive big enough to store the macOS Big Sur installer (13.57 GB).
This tutorial shows you how to create a bootable macOS Big Sur Flash Drive so you can upgrade a Mac that doesn’t have a DVD drive.