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The 2024 Developer Survey results are live! See the results
82 votes
Accepted

Why does Asahi Linux require disabling security features to be installed?

I also have to place the MacBook into "permissive" security mode via recovery to complete the installation. This is a misconception. You are not placing the MacBook into "permissive&...
marcan's user avatar
  • 729
46 votes
Accepted

Is it possible to use Boot Camp with Windows 10 from an external HDD?

Here's an updated procedure for Windows 10, based on orkoden's excellent answer. I tested this process on a MacBookPro11,1 running OS X 10.11.5 (15F34). Throughout the process, directly connect all ...
Alex Lambert's user avatar
25 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
  • 1,093
25 votes
Accepted

Data Not Backed Up, Partition Type: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

To add an answer exactly fitting to your case I slightly modified my answer in the linked "duplicate" and posted it here again. The second as well as the third partition of your internal ...
klanomath's user avatar
  • 66.6k
23 votes
Accepted

Installing Ubuntu on Mac with macOS and Windows already installed

An update version of this has been posted here. Note: These instruction have been updated for use with Ubuntu 18. This answer installs Ubuntu on your computer without the use of third parity tools ...
David Anderson's user avatar
22 votes
Accepted

Prevent Spotlight from indexing external drive

You could have a script that runs at startup that employs the technique suggested in this post https://apple.stackexchange.com/a/91759/183505 When booting from DriveA (when you want to disable ...
David Kerr's user avatar
19 votes

Prevent Spotlight from indexing external drive

I use mdutil command to prevent indexing on external drive, I feel that is more reliable. To check if the external drive has indexing enabled or not, run the command: $ mdutil -s /Volumes/<...
sgon00's user avatar
  • 2,394
15 votes
Accepted

Is there a way to switch Mac OS boot partitions without going through System Preferences?

You can hold down the ⌥ Option key (also known as Alt) at startup, and that will show you all the available boot volumes.
benwiggy's user avatar
  • 37k
12 votes

Is it possible to use Boot Camp with Windows 10 from an external HDD?

Process for 2015- MacBooks (EFI installation) You will need access to a working Windows 10 installation. See other answers to install a virtual machine. In Mac OS: Run Boot Camp Assistant to put ...
Simphax's user avatar
  • 121
11 votes
Accepted

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
10 votes
Accepted

Remove GRUB from macOS Catalina

With Ubuntu, GRUB files are stored in the EFI/BOOT and EFI/ubuntu folders in the hidden EFI partition. Apply the following steps to remove the GRUB files. Enter the following command to determine the ...
David Anderson's user avatar
9 votes

Prevent Spotlight from indexing external drive

I learned today that you can use a sudo touch /.metadata_never_index_unless_rootfs in the root directory of each drive to separate Indexes from OS X Boot-Drives. It is a special version of .metadata-...
Kappuchino's user avatar
9 votes

Is there a way to switch Mac OS boot partitions without going through System Preferences?

If you want a boot manger which behaves similar to GRUB, the you could install rEFInd. This free boot manager is similar, because rEFInd can be configured to display a menu of operating system choices ...
David Anderson's user avatar
7 votes
Accepted

Is it possible to install macOS onto external SSD on a Mac running Ubuntu?

It is quite simple to install macOS on an external drive using macOS Internet Recovery. Plug in the external drive. Turn on or restart your Mac, then immediately hold down ⌘ + R keys. Release the ...
Nimesh Neema's user avatar
  • 52.4k
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
6 votes

Is it possible to use Boot Camp with Windows 10 from an external HDD?

This is basically Alex Lambert's answer from above with a a few updates. You don't need the Automated Installation Kit, you can use commands which are in the ISO. And the install.wim file is no ...
TaoTek's user avatar
  • 61
6 votes

Is it possible to use Boot Camp with Windows 10 from an external HDD?

It is very simple. If you have Parallels or VMWare simply get hold of two free Windows Utilities, miniTools (to format and set up the external drive) and WintoUSB. Put the ISO of Windows 10 or 8.1 ...
Michael Bradley's user avatar
6 votes
Accepted

Installing dual boot Sierra and Kali-Linux

I have managed to get Kali Linux running from USB with persistence, on a Macbook Pro (Retina, 15-inch, Mid 2015) with macOS Sierra. Here's my guide explaining the process I used. I've tried to make ...
Kellan's user avatar
  • 76
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

Is it possible to use Boot Camp with Windows 10 from an external HDD?

These instructions only require the external drive and the Windows 10 iso. No flash drives, virtual machines, Windows kits (AIK or ADK), or any other third party tools are required. Note: An ...
David Anderson's user avatar
5 votes
Accepted

Can I have Windows share disk space with macOS?

Short answer No, it is not possible (to my knowledge, at this time) to boot into one of the other operating systems from a disk image stored on another partition. What I have done in the past is ...
RTHarston's user avatar
  • 259
5 votes

Is it possible to install macOS onto external SSD on a Mac running Ubuntu?

Sure you can, but explaining how depends on the model/year of your Mac. You never need a bootable macOS on the internal drive to install to an external drive from Lion on. So that removes Linux ...
David Anderson's user avatar
5 votes
Accepted

What are the main technical obstacles to running macOS on iPads in the near future?

Technically it is possible. Apple made a Developer Transition Kit (DTK) available to developers back in June 2020 - i.e. the recently released M1 Macs were announced. This DTK runs macOS Big Sur on an ...
jksoegaard's user avatar
  • 78.6k
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
  • 66.6k
4 votes
Accepted

Triple Boot: "Missing operating system" on Windows 7 partition after Ubuntu installation

I was able to fix the issue. The MBR table was messed up after installing Ubuntu. Windows needs an active partition entry in this table. In my case partition #7 (checking the output of diskutil list ...
seb's user avatar
  • 71
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
  • 2,613
4 votes
Accepted

MacOS partition shows up as FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF (Mojave)

This solution will work because you already have System Integrity Protection (SIP) disabled. Note: The current version of gdisk is version 1.0.4. This is the only version that will recognize Apple'...
David Anderson's user avatar
4 votes
Accepted

Unable to boot into Mac OSX after updating dual-boot Ubuntu, Partition Type FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

Usually when the FFFFFFFF-FFFF-FFFF-FFFFFFFFFFFF error occurs, the partition starting and ending values are still correct. I assume this is true in your case. If I am correct, then you need to enter ...
David Anderson's user avatar
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
4 votes
Accepted

Dual Boot Created a New Volume

macOS Catalina has a new feature to further isolate the OS from data. In the APFS container it is installed within, an APFS volume for the OS is created alongside one for your data. The former is ...
grg's user avatar
  • 203k

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