Mac

Here’s the answer to another reader request…

According to WIkipedia, “On Apple–Intel architecture Macintosh computers, the EFI partition is initially blank and not used for booting. However, the EFI partition is used as a staging area for firmware updates.” When people look to create non-standard boot environments or attempt to build a hackintosh, the first step is often mounting and modifying the EFI boot partition. Before you read any further, take note: altering your EFI boot partition is not supported by Apple and The Mac Admin takes no responsibility if you render your computer(s) unbootable by mounting and modifying this partition.

To mount an EFI boot partition, follow these steps:

1. Discover the volume identifier for your EFI boot partition.

  1. MultiBeast for Mac 11.3.0, MultiBeast, the ultimate post-installation utility, has been updated to version 11.3.0 for macOS Mojave 10.14.5+. Free and streamlined utility designed from the ground up to make it as easy to choose the boot device on a hackintosh and install audio, grap.
  2. MacMan’s version of Koen2X’s EFI Mounter v3. Modified to use the diskutil command and sMacMan’s version of Koen2X’s EFI Mounter v2. Modified to use the diskutil command and supports running on systems with up to 10 disks attached. What is the EFI partition?

Mount or unmount the EFI system partition for any volume with a mouse click. Next to each volume, ESP Mounter Pro displays a 'Mount' button that you get to use whenever you wish to effortlessly open the EFI partition. When the task is completed, you get to view the ESP in a Finder window and unmount it. I'm trying to install Ubuntu 18.10 on a new not partitioned HDD (using a VMWare machine). I try with manual partitioning to create the EFI System Partition but there is no EFI System Partition option (or other option containing the EFI word). I tried with 100M, 300M, 500M, 512M sizes but no luck. What's the solution for this?

Run this command:

The output should look something like this:

In this case, the volume identifier of the EFI partition is disk0s1

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2. Create a mount point.

A mount point is a directory where a non-booted volume is mounted. On Mac OS X, mount points are typically created in /Volumes. We can create a directory called efi within /Volumes by running the following command:

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3. Mount the EFI partition at the efi mount point.

Run the command:

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That’s it. Your EFI volume will be mounted. Modify it at your own risk.