Chosen Solution
Hi, and I am hoping someone can shed some light on this issue. I have bought a new SSD for my 13” Macbook Pro Retina Mid 2014, and installed the SSD properly, and as I have a USB Installer for MacOS Big Sur as well as MacOS Catalina. So I went and boot the Macbook from the USB installer, and choose the new SSD and formatted it as an extended Journaled, I then went to click reinstall Big Sur, and it goes fine through the steps and it have 14 minutes countdown and so on, till the end and it will reboot, so after the reboot, it won’t load into the OS nor continue the installation. It instead boots back into the USB Installer. When I remove the USB installer and try to go to the boot preference screen using ALT it just shows no disks to boot from. Any idea of what may be the cause for this? I really appreciate any suggestion at this point.
Sadly you hit a known issue with Big Sur! macOS Big Sur Update Bricking Some Older MacBook Pro Models And this is what we know! Big Sur from Catalina completely failed mid-cycle bricking my Mac The OS never finished the install process as its stuck on the firmware update to your I/O board (which it shouldn’t have touched) At this point I would visit an Apple Store to have them fix your system! It should be covered under warranty (OS) as it killed your I/O board!
