#Create mac os sierra iso for virtualbox install
We can install macOS Catalina as a virtual machine using VMware or VirtualBox for analysis and evaluation purposes before actually upgrading the current system. It also provided the commands required to create the ISO file of macOS Catalina. They do not supply the client/guest add-ins like they do in other OSes (Windows and Linux), so forge. Why Because VirtualBox support for macOS is very, very experimental.
![create mac os sierra iso for virtualbox create mac os sierra iso for virtualbox](https://www.saintlad.com/wp-content/uploads/2017/02/Optimized-macOS-Sierra-Wallpaper-Macbook-Wallpaper-550x344.jpg)
This tutorial provided all the steps required to download macOS Catalina from the App Store using either Mac Mini, Mac Laptop, or iMac. Answer (1 of 9): I have been experimenting lately with macOS virtual machines, and VirtualBox makes them snappier than VMware. The above-mentioned commands will create the ISO file of Catalina and place it on Desktop. Mv ~/Desktop/CatalinaOS.cdr ~/Desktop/CatalinaOS.iso creating file CatalinaInstallESD.part00 creating file CatalinaInstallESD.part01 creating file CatalinaInstallESD.part02 creating file Catalina. Hdiutil convert /tmp/CatalinaOS.dmg -format UDTO -o ~/Desktop/CatalinaOS.cdr Splitting the several-GB InstallESDDmg.pkg into 1GB parts because VirtualBox hasnt implemented UDF/HFS VISO support yet and macOS doesnt support ISO 9660 Level 3 with files larger than 2GB. Hdiutil detach /volumes/Install\ macOS\ Catalina
![create mac os sierra iso for virtualbox create mac os sierra iso for virtualbox](https://i.ytimg.com/vi/wWnWlbH4am8/maxresdefault.jpg)
Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/CatalinaOS -nointeraction Hdiutil attach /tmp/CatalinaOS.dmg -noverify -mountpoint /Volumes/CatalinaOS
![create mac os sierra iso for virtualbox create mac os sierra iso for virtualbox](https://cdn.osxdaily.com/wp-content/uploads/2020/07/macos-installer-iso.jpg)
Hdiutil create -o /tmp/CatalinaOS -size 8500m -volname CatalinaOS -layout SPUD -fs HFS+J Open the terminal and execute the below-mentioned commands to create the ISO file. In this step, we will create the ISO file using the Catalina OS downloaded by us in the previous step. Step 13 Select the ISO image you downloaded to your host computer and click the Open button. If we click the Open Button, it will start installing on the system. To add the macOS Big Sur ISO file to the virtual computer, select the optical drive from the Storage devices, and then click the CD/DVD icon and click Choose a disk file.