Hi everyone,
I've recently installed Ubuntu on an external HD but I'm unable to boot on it at startup.
It tells me that "The version of macOS on the selected disk need to be reinstalled". Do you guys have any ideas of what is going on.
MacOS Big Sur 11.6
Thanks in advance
MacBook Pro 13″, macOS 11.6
what Model-year MacBook Pro 13-in?
recent Macs that have either the T2 chip or Apple-silicon M1 processor require special permissions about booting drives the than the trusted boot drive:
About Startup Security Utility - Apple Support
I do not recommend using Firmware password unless you have extreme risk of system compromise. My bias is based on the number of folks posting here who installed a firmware password (which is used extremely rarely) forget what the password is, and have to get a service appointment and Proof-of- purchase to get it removed.
what Model-year MacBook Pro 13-in?
recent Macs that have either the T2 chip or Apple-silicon M1 processor require special permissions about booting drives the than the trusted boot drive:
About Startup Security Utility - Apple Support
I do not recommend using Firmware password unless you have extreme risk of system compromise. My bias is based on the number of folks posting here who installed a firmware password (which is used extremely rarely) forget what the password is, and have to get a service appointment and Proof-of- purchase to get it removed.
So I changed the security to low and it worked, I just need to connect an external keyboard now as the integrated keyboard and trackpad aren't recognized without drivers.
Thank you again for your help!
From that article:
Medium Security
During startup when Medium Security is turned on, your Mac verifies the OS on your startup disk only by making sure that it has been properly signed by Apple (macOS) or Microsoft (Windows). This doesn't require an Internet connection or updated integrity information from Apple, so it doesn't prevent your Mac from using an OS that is no longer trusted by Apple.
If the OS doesn't pass verification:
On further searching, it appears this was originally implemented for [U]EFI booting, and the Mac now does it as well. It appears the certificates may be controlled by Microsoft.
Linux distributions only have a “shim” [11] signed at the Microsoft portal. The shim is a small boot loader which boots the Linux distributions main GRUB boot loader. Microsoft only checks the signed shim and thereafter your Linux distribution boots normally. This helps to maintain the Linux system as usual.
As reported from various sources, (U)EFI works fine with Fedora/RedHat, Ubuntu, Arch Linux and Linux Mint. For Debian GNU/Linux there is no official support regarding Secure Boot [9]. Anyway, there is an interesting blog post on how to set this up [18] , as well as a description in the Debian Wiki [14].
from:
https://linuxhint.com/secure-boot-linux/
.
Unless you can get a copy of Linux with a certificate that Mac recognizes, you will be forced to use a lower level of Security.
But if you are not a world-class activist (or other target for spying) or keep Military secrets on your Mac, that should not present a real-world problem in most cases.
You are much better installing Linux into a Virtual Machine especially on a USB-C Mac since Linux support of the USB-C Macs is lacking in some areas. Here are a few sites that have been monitoring Linux support for the USB-C Apple laptops:
https://github.com/Dunedan/mbp-2016-linux
https://gist.github.com/roadrunner2/1289542a748d9a104e7baec6a92f9cd7
it's a Macbook Pro 13 2019 intel i5 :)
I have also already allowed booting from an external media and medium security
this is exactly what is happening and I honestly have no clue what to do. Should I switch to the lowest security?
ok, I will try with a lower level of security then. I'll tell you how it is going
Cannot boot on a Linux HD
