Hi all, I have looked at your suggestions but I am still stuck after I tried to upgrade to Big Sur (on a 2018 MacBook Air). When do you exactly use the shift etc options to reboot and get into safe mode? I have pressed it during every possible moment but it doesn’t lead me to a safe mode or any way out of this installation loop.... Stuck with the Apple logo / not finishing the installation and leading to an error message. Just want to go back to my files to save them on a disk. Can anyone advise?