Bootable usb
I have Mac OS Catalina, but when I try downloading Mac OS Big Sur, it says that I can’t download it at that time and to try again later. I was then advised to get a bootable usb and try like that, i was then unable to do that because when I clicked on macOS Big Sur, it came up with a cross in a circle. Any suggestions? Haas this happened to anyone before?
MacBook Pro 13″, macOS 10.15