How To Make Catalina Usb Installer

The new version of OpenCore 0.6.4 is now available. In this article, we will show you how to create a macOS Catalina USB Installer from Ubuntu xx.10. In case you don't have Windows 10, Mac, or Hackintosh, you can use this method to create the USB installer. The steps are pretty easy with very little command line knowledge. For this purpose, you lot will need a USB wink disk with at least 4 GB and a expert internet connexion. This guide is based on the official OpenCore website at Dortania.

Steps to Create macOS Catalina USB Installer from Ubuntu 20.10

The following method should works on other Linux distributions likewise.

Stride 1. Install Python

Make sure we have Python installed. Ubuntu xx.ten comes with Python 3 installed past default. Verify if Python is installed with this command

python --version

python3 --version

Information technology should print something like this

Python 3.8.6

If both commands return nothing or print some error, then we need to install Python.

sudo apt install python3

Footstep 2. Download OpenCore 0.vi.4

UPDATE !!!

The script in the OpenCore 0.6.four is cleaved. You volition get the post-obit mistake when trying to download macOS installation file using the macrecovery.py script.

And then, yous will need to download the post-obit file

https://github.com/acidanthera/OpenCorePkg/annal/master.zip

Excerpt the zilch file and use the we will use the macrecovery.py within the Utilities folder. Continue reading for the consummate steps.

~~Now we demand to get the latest OpenCore 0.6.iv. You can become information technology from this link beneath.~~

~~https://github.com/acidanthera/OpenCorePkg/releases/download/0.six.4/OpenCore-0.6.4-RELEASE.zip~~

~~Next, extract the Zip file and it will create a new directory called something like OpenCore-0.6.4-RELEASE.~~

Step 3. Download macOS Catalina

Now let'due south download the macOS Catalina. Make sure y'all are connected to the internet. First, open Terminal and then cd to the macrecovery folder inside the OpenCorePkg-master/Utilities/macrecovery binder.

cd ~/Downloads/OpenCorePkg-chief/Utilities/macrecovery

And and so use this command to download macOS Catalina

python3 ./macrecovery.py -b Mac-00BE6ED71E35EB86 -m 00000000000000000 download

As you can meet, I utilise python3 since I have the Python version iii.vi.eight installed on my Ubuntu 20.10. Await until the download completes.

After the download process completed, you should see the following files inside the macrecovery folder

BaseSystem.dmg
BaseSystem.chunklist

We are going to need these two files.

Step 4. Making the Installer

At present we take all nosotros need to build the macOS Catalina USB Installer. Plug in the USB bulldoze to the Ubuntu xx.10. Nosotros are going to format the drive. Make sure there is no important data in it.

A. Format the USB Bulldoze

Open Terminal and execute this command to check our USB drive

lsblk

It should prints something like this

Every bit you tin can meet, my SandDisk USB bulldoze is recognized as sdb. Your dive could be unlike from mine. So make a note of information technology.

sudo gdisk /dev/sdb

At present type o to clear/delete all the segmentation tables that be on the USB drive.

Answer y and press Enter . Now type n to create a new sectionalization tabular array.

Yous will need to answer some questions

Partitioning number: Leave blank
First sector : Leave blank
Final sector: Go out blank
Hex code or GUID: 0700

Now let'due south write the new layout. Type w and printing Enter .

Make certain there is no error on this procedure.

Now, let's check with lsblk again

Now there is a partition /dev/sdb1 under /dev/sdb. As you can see, my USB disk is mounted as /media/dhani/EFI. So we take to unmounted it.

sudo umount /dev/sdb1

And then use this command

sudo mkfs.vfat -F 32 -northward "OPENCORE" /dev/sdb1
mkfs.fatty 4.1 (2017-01-24)

The control will format the USB drive to FAT32 and rename it to OPENCORE.

B. Mount the sectionalization

At present, we demand to mount the OPENCORE partition we've created using the above method. I will use the Disks awarding that comes with Ubuntu 20.10. Open Disks then select the USB drive every bit shown below.

Click the Mount button (little black triangle).

Now my partition is mounted at /media/dhani/OPENCORE.

C. Copy Files

First, nosotros need to make a new directory inside the OPENCORE sectionalization. Do not become confused. This OPENCORE is the USB partition nosotros've mounted from the stride in a higher place.

Create a new folder called com.apple.recovery.kick . You lot tin practise information technology from the terminal also.

mkdir /media/dhani/OPENCORE/com.apple.recovery.boot

Now copy the two files (BaseSystem.chunklist and BaseSystem.dmg) to the com.apple.recovery.kicking from the folder OpenCore-0.6.4-RELEASE/Utilities/macrecovery.

Done. At this indicate, the macOS Catalina USB Installer is ready. BUT, you will still need to continue the journeying to the making or configuring the EFI. Please visit the official guide for OpenCore below to know how to configure EFI for your build.

https://dortania.github.io/OpenCore-Install-Guide/installer-guide/opencore-efi.html