Create Dmg Variable Size Catalina

 

Create a bootable macOS Catalina installer that can be used to perform clean or upgrade installs on your Mac. Your source for expert tips, special deals, commentary, reviews, and the latest tech news.

Overview

Simple script to automatically download, install and run macOS 10.15 Catalina (and other versions) in VirtualBox on macOS. Since VirtualBox does not support booting from APFS volumes, this script is copying the APFS EFI drivers automatically.

ToC

Required Software

The following software is needed.

  • macOS Installer
  • VirtualBox
  • VirtualBox Extension Pack (note: released under the Personal Use and Evaluation License)

Create Dmg Variable Size Catalina Model

Step by Step Video

Two minute summary video:

Step by Step

Execute make all to setup and run everything. After the installer reboots, press enter in the terminal to finish the installation.

Customizing your build

Additionally the following parameters can be customized with environment variables:

variable namedescriptiondefault value
VM_NAMEname of the virtual machinemacOS-VM
VM_DIRdirectory, where the virtual machine will be storedHOME/VirtualBox VMs/$VM_NAME
VM_SIZEthe size of the hard disk32768
VM_RESmonitor resolution1680x1050
VM_RAMram size in megabytes4096
VM_VRAMvideo ram size in megabytes128
VM_CPUnumber of cpu cores to allocate2

Execute make to get some help:

FAQ

  • Graphic Issues
    • Q: Applications such as Apple Maps do not work as expected.
    • A: There is currently no 3D acceleration, therefore some applications do not work.
  • Recovery
    • Q: How do I start the recovery mode?
    • A: Start VM as usual and press CMD+C then you see Trying to find a bootable device... then type fs4: then cd TAB then ./boot.efi (note that using fs4 might be a different one in your case).
  • Installation Loop
    • Q: After starting the installation the VM restarts and I see the installer again.
    • A: You've to press enter in the terminal after the installer restarts.
  • Installation Not Starting
    • Q: I've pressed Continue to start the installation and nothing happens for minutes.
    • A: Your macOS installer might be incomplete or corrupted, please download it again from Apple.
  • Error Message
    • Q: I get the error code 2, 3, 4, or 6.
    • A: You need to have some software components installed on your machine (VirtualBox, VirtualBox Extension Pack, awk). If you've installed Homebrew, the script will partly install these automatically. Otherwise, you need to install them manually.
  • Reboot
    • Q: I see the message MACH Reboot. What should I do?
    • A: The VM failed to restart. Restart manually. However, this should not happen anymore with the latest version.
  • Kernel Panic
    • Q: I see the message Error loading kernel cache (0x9). What should I do?
    • A: This error is shown from time to time. Restart the VM. However, this should not happen anymore with the latest version.
  • Black Screen
    • Q: When I then boot I don't see anything, just a black screen. What should I do?
    • A: Change the VM version in the settings from Mac OS X (64-bit) to macOS 10.13 High Sierra (64-bit)
  • Slow
    • Q: Why is the VM so slow?
    • A: Maybe #71 provides some insights.
  • Other Issue
    • Q: Something is not working. What should I do?
    • A: Create a ticket

Create Dmg Variable Size Catalina 2

macOS Catalina is the latest Mac Computer Operating system released by Apple Inc. To install macOS Catalina on any Mac Computer or Mac Laptop you need to download the macOS Catalina DMG File. Which is free to download from Apple official website, but for that, you need to have a developer account. Due to this, we will provide a direct download link for macOS Catalina DMG file on this article. The main goal of this article is to provide macOS Catalina in 3 Different formats of DMG file, ISO File and VMDK file. The ISO and VMDK files are used to install macOS Catalina on any virtual machine using any virtualization software like VMware and VirtualBox. This Virtualization software mostly used by windows users. by default you will not be to install any macOS operating system on VMware or VirtualBox as windows users but. the ISO and VMDK file will make it possible for you to install macOS Catalina on Virtual Machine as use macOS Catalina as a guest operating system as a windows users.

In case if you need macOS Catalina on any of the following format you can use the direct download links and install it on your Mac Computer or even on a virtual machine as windows users.

Download macOS Catalina DMG

Downloading macOS Catalina DMG file from Apple store sounds easy but the problem is here that they will not provide a complete file of macOS Catalina the rest of the file will be downloaded during the installation of Catalina. But here we will provide you a direct download link to macOS Catalina complete file is completely offline installer.

The Catalina DMG file is about 6 GB and will be available for download as a single file from powerful cloud storage you will not face any issue during the download the Catalina DMG file.

Download macOS Catalina ISO

CreateCreate Dmg Variable Size Catalina

After Downloading macOS Catalina DMG file you need to convert that into ISO file in case if you need it for Virtual Machine or installing macOS Catalina from Bootable USB Flash Drive. To convert macOS Catalina from DMG to ISO file follow the below process which will help you to make the ISO file from DMG file.

Create Dmg Mac

  1. Create a DMG Disk Image
    hdiutil create -o /tmp/Catalina -size 7900m -volname Catalina -layout SPUD -fs HFS+J
  2. Mount it to your macOS
    hdiutil attach /tmp/Catalina.dmg -noverify -mountpoint /Volumes/Catalina
  3. Create macOS Catalina Installer
    sudo /Applications/Install macOS Catalina Beta.app/Contents/Resources/createinstallmedia –volume /Volumes/Catalina –nointeraction
  4. Unmount Catalina Disk
    hdiutil detach /volumes/Install macOS Catalina Beta
  5. Convert the dmg file to an iso file
    hdiutil convert /tmp/Catalina.dmg -format UDTO -o ~/Desktop/Catalina.cdr
  6. Rename and Move to Desktop
    mv ~/Desktop/Catalina.cdr ~/Desktop/Catalina.iso

Download macOS Catalina VMDK

macOS Catalina VMDK file is designed for Virtual Machine, even that is VMware or VirtualBox. The VMDK file format is only supported in Virtual Machine. Mostly Windows users use this method to install macOS on a Virtual Machine as Windows users. Apple doesn’t Allow macOS Installation on any third-party software, that’s why windows users useful tips and tricks to install macOS on a virtual machine. followings are the complete tutorial on how to install macOS on a Virtual Machine using VMware or VirtualBox Virtualization Software.

Create dmg mac
How to Install macOS on Vmware on Windows
How to Install macOS on VirtualBox on Windows

Create Dmg Variable Size Catalina 2

If you need the macOS Catalina VMDK File use the below links for a direct download link you don’t need to be worried about creating the VMDK file. that’s a complicated process by downloading and following the installation guide you will able to install macOS on a Virtual Machine as Windows users.