How to boot a mac with the macos big sur usb install drive. Create macos big sur bootable usb on mac using terminal.
The installation has been covered in another section.
Create bootable usb mac disk utility big sur. If your drive is named something. Open app store and search for macos big sur. Select the macos big sur option from the drop down menu.
As the big sur is available in beta version only you can easily create a bootable usb by running a single line of terminal command in your existing mac os. Click get and the software update window will open. The installer is 12gb so be patience.
When the macos installer opens follow the onscreen instructions. Use the terminal to make a bootable macos big sur installer drive. Download macos big sur.
Turn on your mac and continue to hold the power button until you see the startup options window which shows your bootable volumes and a gear icon labled options. Power on the mac and hold on the options button on the keyboard. In these instructions i use untitled as the name of the external drive.
Insert usb on the mac and then launch disk utility. On the disk utility window you have to erase the drive in which you want to install macos big sur. Click upgrade now and it will start downloading the macos update.
Plug in an external drive with at least 12gb space as. After that the utility window will be opened you have to select the disk utility. Select the volume containing the bootable installer then click continue.
Select and copy. Immediately hold down the option key upon mac boot continuing to hold option alt until you see the mac. Sudo applications install macos big sur app contents resources createinstallmedia volume volumes untitled.
Connect the macos big sur beta install drive to the mac. Restart the mac if it s already started up otherwise boot it up as usual. These are the instructions to follow to create your bootable usb note there will be tiny adjustments depending on the installer you require.
After creating the bootable installer you must restart your mac and invoke the startup manager at boot time which will let you choose the macos big sur installer on your usb thumb drive or other external drive as your boot disk. How to create macos big sur bootable usb the following is a guide for creating macos big sur bootable usb. Connect the external drive to your mac.
This command creates a bootable usb installer based on macos big sur app which we ve previously placed in your applications. Follow the steps ahead to use your macos big sur bootable installer. 1 plug the bootable installer into your mac.
If you don t see macos big sur in app store follow this link and choose open link in app store. Type in your admin password and press return and y to confirm the action.