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72 votes

MacBook Pro: How to disable discrete GPU permanently from EFI?

You can permanently disable discrete graphics card following next steps: UPDATE! Try to edit NVRAM variable from Single-User mode The procedure described in the steps 1-3 worked for me until macOS ...
Fernando N.'s user avatar
24 votes
Accepted

How to examine disks and their partitions via terminal?

Examine with diskutil list diskutil info /dev/disk0 (disk0s1 etc.) sudo gpt -r show disk0 fdisk /dev/disk0 (make/change partitioning with MBR) sudo gdisk -l /dev/disk0 (make/change partitioning ...
bomben's user avatar
  • 1,073
24 votes
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How can I triple boot MacOS Catalina , Ubuntu 18.04, and Windows 10

These instructions are for the latest Intel Macs which boot macOS from an APFS volume and EFI boot both Windows and Ubuntu. If you need to install Ubuntu on a Mac with an internal PCIe-based SSD and/...
David Anderson's user avatar
14 votes
Accepted

How to fix broken GPT, GUID and unmountable, no type volumes?

The content type of the second partition is wrong. Instead of FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF it has to be 53746F72-6167-11AA-AA11-00306543ECAC. To edit the content type you have to boot to ...
klanomath's user avatar
  • 66.3k
13 votes
Accepted

How to disable SIP when Big Sur or later macOS is installed in a VMware Fusion Player virtual machine

Follow the steps below to disable System Integrity Protection (SIP). Start by booting to macOS Big Sur and opening a Terminal application window. Next, enter the command given below. This will create ...
David Anderson's user avatar
12 votes

MacBook Pro: How to disable discrete GPU permanently from EFI?

Your Dilemma I'm in full sympathy with your wish "save on battery and reduce heat, without paying the noise cost" of using the discrete graphics card inside a MacBook Pro. Warning Before you ...
Foliovision's user avatar
  • 1,041
12 votes
Accepted

Secure erased drive - always one file can be found

When you use Disk Utility to erase the drive, the process ends by actually formatting the drive afresh. In the process, a VolumeConfiguration.plist file is created for Spotlight search indexing. The ...
jksoegaard's user avatar
  • 77.6k
11 votes
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Not able to mount EFI partition with diskutil after installing Ubuntu

Occasionally, you will encounter scarecrows. Here is one such example. Observe: Marlin:~ davidanderson$ diskutil mount disk0s1 Volume on disk0s1 failed to mount If the volume is damaged, try the "...
David Anderson's user avatar
11 votes
Accepted

Can a Mac "boot" from the internet if the recovery partition is absent/corrupted?

Assuming the Mac is newer than about 2011, it can boot to Internet Recovery. Cmd ⌘ Opt ⌥ R will direct it to Internet Recovery, or it will redirect itself from Cmd ⌘ R if there is no usable ...
Tetsujin's user avatar
  • 115k
10 votes

GRUB 2 error – "fb: switching to radeondrmfb from EFI VGA"

There seems to be a problem with the radeon driver when booting. You can test a fix by doing this: When you see the grub menu, press 'e', which will allow you to edit the entry. Go to the line with "...
OlympusMonds's user avatar
10 votes

MacBook Pro: How to disable discrete GPU permanently from EFI?

Your planned procedure is possible. Your planned procedure is not that difficult. Your planned procedure is not the best option. Why this route is suboptimal MacBook Pros will and have to switch to ...
LаngLаngС's user avatar
  • 8,279
10 votes
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EFI Partition Change name and Logo

The icon displayed in the Mac Startup Manager can be changed by putting an icon set file named .VolumeIcon.icns in the root folder of the EFI partition used by Windows. Or, you can follow the ...
David Anderson's user avatar
9 votes

How to update latest MacBook pro EFI firmware manually?

Just wanted to post on this topic since I had a related problem in an Apple store yesterday and this was the post I found. Apple had replaced my logic board but didn't install the newer firmware ...
Bren's user avatar
  • 91
8 votes
Accepted

Installing Ubuntu 16.04 server on Mac Mini 2006

Alright, I see you've added some requisites to your answer. Here goes. Part 1: Install Ubuntu 16.04 Server. Download this. (Ubuntu Server 16.04 32-bit) This is done the same way any other Linux ...
ThePCpenguin's user avatar
8 votes
Accepted

How to update latest MacBook pro EFI firmware manually?

The EFI partition is used when the firmware is updated. I assume this EFI partition must be on the primary internal disk. Apple posted that firmware updates require a GUID partition scheme at the ...
David Anderson's user avatar
7 votes
Accepted

Replacing macOS with elementary OS. Computer boots normally into elementary OS, but boot menu (option key on boot) doesn't show anything

Note: In the examples below, the download elementary OS installation was named elementaryos-0.4.1-stable.20180214.iso. The images were created using VirtualBox 5.2.16 r123759 (Qt5.6.3). Why does ...
David Anderson's user avatar
7 votes

rEFInd installation won't boot due to T2 security, despite T2 security being disabled

Recreating the Problem Before I provide an answer which explains how to install rEFInd to work properly on a Mac with a T2 chip, I will first incorrectly install rEFInd by following a path similar to ...
David Anderson's user avatar
5 votes

How do I get rEFInd working with OS X 10.11 El Capitan?

I know this is an old question, but I just had to go through this issue when attempting to install rEFInd on a 2015 MBP. When trying to install by running ./refind-install in the terminal, I kept ...
Ayden's user avatar
  • 51
5 votes

How to create linux USB discs that do work on Apple Macs?

When first posted in 2013, this question never received an answer, because there is no answer. In other words, Intel Macs can not BIOS boot from flash drives. I make the BIOS boot assumption based the ...
David Anderson's user avatar
5 votes
Accepted

Bless error when installing rEFInd

If you wish to attempt to use rEFInd from a MS-DOS partition, then follow the instructions below. I have made the following assumptions. You will be reusing disk0s3. System Integrity Protection is ...
David Anderson's user avatar
5 votes
Accepted

Mac Partition won't boot after Bootcamp Partition Resize

The partition GUID of disk0s2 (DE94BBA4-06D1-4D40-A16A-BFD50179D6AC) is probably wrong. It designates the partition as a Windows Recovery Environment, which is the ugly stepsibling of macOS' recovery ...
klanomath's user avatar
  • 66.3k
4 votes

How can I install the newest EFI firmware upgrade from El Capitan?

First check your current Firmware and SMC version About your Mac -> More -> System Report. Check the Boot ROM and the SMC version. It should look similar to this: The latest Boot ROM version for your ...
klanomath's user avatar
  • 66.3k
4 votes

How to create linux USB discs that do work on Apple Macs?

Check Ubuntu's tutorial how to create a bootable USB stick on macOS, where it is suggested to use Etcher app (open source) which can help to flash OS image to SD cards & USB drives. However, if ...
kenorb's user avatar
  • 12.6k
4 votes

MacBook Pro: How to disable discrete GPU permanently from EFI?

If anyone is still looking for ways to do this, please check out this MacRumors forum post. I followed the steps mentioned in that forum post and my 15" MacBook Pro 2011 is working perfectly using ...
Phyo's user avatar
  • 191
4 votes
Accepted

How to safely install rEFind from recovery mode?

Though you shouldn't see this message (even with SIP enabled) in Recovery Mode you can type Y and continue installing rEFInd. A less rocky but time consuming way is to disable SIP in Recovery Mode by ...
klanomath's user avatar
  • 66.3k
4 votes

Is it possible to reinstall MacBook firmware?

Do MacBook devices have something [firmware] similar? Yes. It's call the EFI or Extensible Firmware Interface Is it possible to reinstall MacBook firmware? Yes. See this post: Where is the EFI ...
Allan's user avatar
  • 100k
4 votes
Accepted

How to install Linux on a macbook?

Download Ubuntu Live CD and burn it. Install rEFIt (this step is optional, you can hold 'Alt' to select partition everytime instead). Use Boot Camp Assistant (it's in Applications/Utilities) to create ...
Melvin Jefferson's user avatar
4 votes

how to boot a from a DVD?

Press and hold the C key on boot to attempt booting from the optical drive. If that doesn't work I'd recommend trying the boot CD in another machine, and a different boot CD in the mac.
Scottmeup's user avatar
  • 2,585
4 votes
Accepted

Why does Refind break when upgrading from Mac OS High Sierra (HFS) to Mojave (APFS) on NVMexpress Macs?

Solution: EDIT: Thank you to @DavidAnderson for pointing out that the driver file "hfs_x64.efi" is what causes the Mac to be able to see the bootable container on the mac. Please see his answer for ...
chrisdahfuh's user avatar

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