- Make a bootable usb from iso mac how to#
- Make a bootable usb from iso mac install#
- Make a bootable usb from iso mac upgrade#
You now have a bootable macOS Big Sur USB Flash drive that you can use to upgrade your Mac or do a fresh install.
Make a bootable usb from iso mac install#
Install media now available at "/Volumes/Install macOS Big Sur"
Wait for the installer to be copied and the disk to be made bootable.Įrasing disk: 0%. If you wish to continue type (Y) then press return: y To continue we need to erase the volume at /Volumes/Sandisk. When asked to erase the volume, press y then return. createinstallmedia -volume /Volumes/Sandisk Boot Camp Assistant will automatically locate the ISO file from your downloads folder, but make sure it is the right file. Now theres no need to format the disk again and again or to extract. Replace the volume with the mount point of your erased disk. Ventoy is an open source tool that lets you create a bootable USB drive for ISO files. Open the Terminal app and change into the directory containing the createinstallmedia utility.Ĭd /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources. 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. The USB Flash Drive will need to be wiped so don’t use a drive with existing data because you will lose it. You will need a USB Flash drive big enough to store the macOS Big Sur installer (13.57 GB). Make a bootable usb from iso mac how to#
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. This page contains links to products that may earn us a small commission at no extra cost to you, should you click on them and make a purchase.
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