Making the installer in Linux

Supported version: 0.8

While you don't need a fresh install of macOS to use OpenCore, some users prefer having a fresh slate with their boot manager upgrades.

To start you'll need the following:

4GB USB Stick
macrecovery.py

Downloading macOS

Now to start, first cd into macrecovery's folder and run one of the following commands:

# Adjust below command to the correct folder
cd ~/Downloads/OpenCore-0/Utilities/macrecovery/

Next, run one of the following commands depending on the OS you'd like to boot:

# Lion(10.7):
python3 ./macrecovery.py -b Mac-2E6FAB96566FE58C -m 00000000000F25Y00 download
python3 ./macrecovery.py -b Mac-C3EC7CD22292981F -m 00000000000F0HM00 download

# Mountain Lion(10.8):
python3 ./macrecovery.py -b Mac-7DF2A3B5E5D671ED -m 00000000000F65100 download

# Mavericks(10.9):
python3 ./macrecovery.py -b Mac-F60DEB81FF30ACF6 -m 00000000000FNN100 download

# Yosemite(10.10):
python3 ./macrecovery.py -b Mac-E43C1C25D4880AD6 -m 00000000000GDVW00 download

# El Capitan(10.11):
python3 ./macrecovery.py -b Mac-FFE5EF870D7BA81A -m 00000000000GQRX00 download

# Sierra(10.12):
python3 ./macrecovery.py -b Mac-77F17D7DA9285301 -m 00000000000J0DX00 download

# High Sierra(10.13)
python3 ./macrecovery.py -b Mac-7BA5B2D9E42DDD94 -m 00000000000J80300 download
python3 ./macrecovery.py -b Mac-BE088AF8C5EB4FA2 -m 00000000000J80300 download

# Mojave(10.14)
python3 ./macrecovery.py -b Mac-7BA5B2DFE22DDD8C -m 00000000000KXPG00 download

# Catalina(10.15)
python3 ./macrecovery.py -b Mac-00BE6ED71E35EB86 -m 00000000000000000 download

# Big Sur(11)
python3 ./macrecovery.py -b Mac-E43C1C25D4880AD6 -m 00000000000000000 download

# Monterey (12)
python3 ./macrecovery.py -b Mac-E43C1C25D4880AD6 -m 00000000000000000 download

# Latest version
# ie. Ventura (13)
python3 ./macrecovery.py -b Mac-B4831CEBD52A0C4C -m 00000000000000000 -os latest download

From here, run one of those commands in terminal and once finished you'll get an output similar to this:

Making the installer

This script automatically flash the recovery and OpenCore to the USB-drive, the Opencore partition will be mounted at/mnt
if you prefer to do the entire process manually skip to the manual installation.

curl -o ocfd.sh https://raw.githubusercontent.com/Broly1/ocfd/main/ocfd.sh && chmod +x ocfd.sh && ./ocfd.sh

or manually download it a paste it inside /macrecovery/ directory and type ./ocfd.sh

type in your root password and wait for the script to do its job.

Manual Instalation

For manual instalation this section will target making the necessary partitions in the USB device. You can use your favorite program be it sgdisk gdisk fdisk parted gparted or gnome-disks. This guide will focus on sgdisk as it's fast and simple.

Method 1

In terminal:

run lsblk and determine your USB device block
run sudo umount /dev/xxx?* replace /xxx with your USB block
run sudo sgdisk --zap-all /dev/xxx && partprobe to remove all partitions on the drive
run sudo sgdisk /dev/xxx -o to clear the partition table and make a new GPT one
run sudo sgdisk /dev/xxx --new=0:0: -t 0:0700 && partprobe to create a Microsoft basic data partition type
run sudo mkfs.vfat -F 32 -n "OPENCORE" /dev/xxx1 to format your USB to FAT32 and named OPENCORE
Use lsblk to determine your partition's identifiers
mount your USB partition with udisksctl (udisksctl mount -b /dev/xxx1, no sudo required in most cases)
or with mount (sudo mount /dev/xxx1 /where/your/mount/stuff, sudo is required)
cd to your USB drive and mkdir com.apple.recovery.boot in the root of your FAT32 USB partition
now cp or rsync both BaseSystem.dmg and BaseSystem.chunklist into com.apple.recovery.boot folder.

Method 2 (in case 1 didn't work)