volume macOS Base System is read-only

[fphstanm]

Hi guys, I'm new here. So I spent 3 days trying to install Big Sur (Catalina is installed now)
Not sure what is certainly stops the install, but I think it caused by "read-only" error.

- HID: legacy shim 2
- Generation from SMC report as 2
- macOS Base System is read-only
- Loweset level disk is not mounted

I changed usb flash, tried different .aml files and kexts (also used files, kexts and config.plist from Catalina)
Also I chcked the flags for bios CFG Lock and unlocked CFGLock.efi, but seems the problem is in EFI folder.. How can I make it readable or

 

[Feartech]

Hi guys, I'm new here. So I spent 3 days trying to install Big Sur (Catalina is installed now)
Not sure what is certainly stops the install, but I think it caused by "read-only" error.

- HID: legacy shim 2
- Generation from SMC report as 2
- macOS Base System is read-only
- Loweset level disk is not mounted

I changed usb flash, tried different .aml files and kexts (also used files, kexts and config.plist from Catalina)
Also I chcked the flags for bios CFG Lock and unlocked CFGLock.efi, but seems the problem is in EFI folder.. How can I make it readable or

XhciPortLimit needs to be disabled with Big Sur

using a desktop smbios is not correct for a laptop

please read the faq for proper hardware profile setup:

[FAQ] READ FIRST! Laptop Frequent Questions

This is an updated FAQ from the Original Thread: https://www.tonymacx86.com/threads/faq-read-first-laptop-frequent-questions.164990/post-1045259 Before asking a question, many common questions are already commonly asked and answered, and many answers exist in the sticky threads in this forum...

www.tonymacx86.com

[Guide] Booting The USB Installer Using OpenCore

A guide in setting up your USB installer using OpenCore. You must have either a built-in ethernet or compatible Broadcom Wifi in your laptop for this guide to work. Built-in Intel Wifi can also work if set correctly...

www.tonymacx86.com

 

[fphstanm]

Thanks a lot, I missed that in opencore page. Will try to configure due to laptop manual lol)