Bootable USB to install Mac big sur

lister wrote:

I’ve followed the terminal to install a copy of big sur onto a USB Bootable drive. I wanted to clean my old MacBook Pro mid 2014. When I restart and click option I’m presented with the Mac drive or a windows drive? When I choose a windows drive (usb) I get a strange dark window saying this is not a bootable drive, like a PC command. Why can I not use the bootable drive. Could this be down to the USB drive stick?

lister

Were you successful in creating the bootable installer... "Install macOS Big Sur" ?

The alternative to Option key when rebooting —is to simply open the USBinstaller from your Desktop to proceed...

you can launch it from there—the computer will restart on it's own.

ref:

How to create a bootable installer for macOS - Apple Support

What to do before you sell, give away, or trade in your Mac

Hi,

You could install Big Sur on your MacBook Pro with Recovery Mode.

How to reinstall macOS - Apple Support