Spoiler alert – I use VMWare Fusion on Catalina 64bit to run 10.14

Oct 1, 2019 @ 3:03pm. It would need to be 64 bit because MacOS Catalina will be dropping all support for 32 bit applications. If Portal 2 or any other game is not updated to 64 bit then it will no longer run on Mac operating systems after the next version is released. With the release of macOS Catalina, 32-bit app support is no longer available, which means many of your older apps will no longer work if they haven't been updated to 64-bit.


  • Find the 10.14 download in the app store
  • Download (and see install failure)
  • Find download app in finder
  • Run installation in VMWare
  • enjoy!
Will macos catalina support 32 bit apps


  • Internet connection for the download.
    • It would seem the installation can be done ‘offline’
  • Mac OS Host – I’m using Catalina 64bit beta 7
  • VMWare (I don’t know if VirtualBox would also work, please leave a comment below if you have any experience with this)
  • 25GB free space – the installation paused a number times due to lack of space

Find the 10.14 download in the app store


Download the installation file

Click GET, and wait for the download ~6GB, could take some time…

On completion, the ‘upgrade‘ should fail to install.

You will find the installation media in the /Applications folder.

Create the VM

Create a new VM, and drag the “Install macOS Mojave” to the wizard

Click through the remaining screens, config the VM as needed (e.g. CPU & RAM settings). Start the VM – you should see the boot screen…

Does Macos Catalina Support 32 Bit Apps


At this stage you might run out of disk space… if so, you can delete the “Install Mojave” file from /Applications and empty your trash

Final steps


Macos Catalina 32 Bit Support Driver

  • Install VMWare Tools

The installation copies the source disk into the VM – it takes 5GB additional space…

I decided to move these files to USB and so I we need to edit the VMX file to match

Finding and extra 6GB on the installation target…

  • Open the VM to display the contents
  • Move the Temp Installation Source files to USB
  • Remove the 2nd disk from the VM
  • Add it again – this time, using an existing disk, and point to the disk now on USB

NOTE: this did not work for me using the GUI, I decided to edit the VMX file manually


Finally, if you have TimeMachine running on your machine, run this command to free up 10GB

While most major app developers have made the switch to 64-bit, if you’re worried about losing access to your favorite Mac apps with the new update, here’s how to check if they are 32-bit apps or 64-bit apps: Launch Spotlight, and type ‘System Information.’ Open the System Information app. MacOS Catalina is here, and with the update comes the transition from 32-bit apps to 64-bit apps. Overall, this is a good thing because it means that apps will run faster and access more memory. How to uninstall apps on macOS Catalina. When you install macOS 10.15 on your computer, the system informs you that some of the installed apps are not optimized to run on your Mac. These 32-bit apps are not compatible with macOS Catalina. Once macOS 10.15 is installed, the icons of incompatible programs are crossed out in the Applications folder. How to Run 32-Bit Apps in macOS Catalina. Apple's latest version of macOS, Catalina, officially ditches 32-bit app support, but you can still run the software you need by following these steps. After upgrading to macOS Catalina, you will see some old 32-bit application icons appear as broken icons, which means they no longer work on the new macOS. Some of them can be updated to the latest 64-bit from the product website or other download sites to support macOS Catalina, but unfortunately, some application developers have gave up.

Summer is over and autumn is upon us. This means the weather is changing, kids are back at school, and Apple has released a new version of its Macintosh operating system.

The latest release is version 10.15, also known as Catalina. You can upgrade if your Mac is 2012 or newer, however, as with any upgrade there are always challenges when it comes to hardware and software compatibility.

Will Macos Catalina Support 32 Bit Apps

One major change in Catalina is that it only supports 64-bit apps and does allow 32-bit apps to run. This means some third party applications will not work after the upgrade.

To check the apps on your Mac, go to the Apple menu and select About This Mac. Click on the System Report, then scroll down and select Applications. The rightmost column of this report shows 64-bit (Intel) compatibility.

Macos Catalina 32 Bit Support

Macos Catalina 32-bit Support

One more thing to remember is that there are other reasons for an app to stop working. A 64-bit app might still run on the new operating system but that doesn’t mean it will work the way it should. The best way to check software’s compatibility is to refer to the manufacturer’s website to see if it will work under Catalina.