Extensible Firmware Interface is a specification that defines a software interface between an operating system and platform firmware
Questions tagged [efi]
344 questions
2
votes
1 answer
edit efivars on MacOSX
On Linux, I can edit the efivars of my MacBookPro via /sys/firmware/efi/efivars/. E.g. here is a description to disable the AMD GPU via the efivars, which basically is this on Linux:
printf "\x07\x00\x00\x00\x01\x00\x00\x00" >…
Albert
- 527
2
votes
1 answer
Can't make rEFInd show boot menu again!
I'd install rEFInd in my Mac Mini 2,1. It has a OS X Lion bootable partition and a Windows 10 install ntfs partition. I tried to boot from the ntfs partition but the Windows Installer won't run, only a black screen with a DOS cursor blinking. Now I…
Gustavo
- 645
1
vote
1 answer
Intel EFI shell on Mac
I would like to try Intel's EFI shell.
How can I (build and) install EFI Shell on Mac? I've seen prebuilt binary, but I'd like do build it myself and I don't trust stuff from file-sharing sites.
There is EDK but isn't it for Windows only or maybe I…
Alex Bolotov
- 2,481
1
vote
1 answer
Mac OS X EFI and installing rEFInd on SD card with Linux OS
I have a MacBook Pro (2013) running Sierra on the internal SSD.
I’ve installed Debian12 onto an SD card. Upon boot (by holding down the Alt key) it doesn’t show an option of EFI Boot.
But having flashed rEFIND-cd onto a USB, and once I plug it in,…
101rabb1ts
- 13
0
votes
1 answer
/Volumes/EFI - Firmware.scap & MBA41_0077_B12_LOCKED.scap
Sorry for bad english - this is computer translation.
See figure - MBA41_0077_B12_LOCKED.scap (# 2) - is the actual firmware of my MacBookAir4,1, which is was used to update firmware, but that such Firmware.scap (# 1)? And the date of the change…
cave-canem
- 323
0
votes
1 answer
How to uninstall rEFInd (0.8.2) on Yosemite
I'd like to remove rEFInd, since my laptop doesn't wake up from suspension (provided that the laptop is only powered by battery) anymore eversince I installed it (in neither of the operating systems: Mac OS and Ubuntu).
Assuming one has installed…
ndrizza
- 143
0
votes
1 answer
MBP early 2011 EFI update
I'm trying to install this EFI Update. Which is for :
Mac OS X 10.6.8 / OS X Lion 10.7 and later
And I'm running on 10.9.3 but the update installer throw an alert :
The update is not supported by your system.
What's wrong?
Thomas Ayoub
- 2,008
0
votes
1 answer
Run the Single User mode with rEFIt installed
I recently installed rEFIt boot for a small linux partition. I then tried to boot up into single user mode by hitting {COMMAND + S}, but rEFIts own terminal came up.
Is there any way to still get into single user mode while rEFIt boot is installed?
Skyler 440
- 759