Question :
I have just upgraded to macOS 10.15 Catalina, but I just found out that I still have an old iPhoto database somewhere that I want to integrate with Photos.app using the official Apple iPhoto Updater application. But that’s 32-bit software, so it won’t run in macOS 10.15 Catalina…
What can I do ?
Answer :
How To Use 32 Bit Apps On Catalina Mac
The easiest option is to find a Mac that still runs one of the latest versions of the 32-bit supporting versions of macOS like 10.13 High_Sierra or 10.14 Mojave.
In any version of macOS before 10.15 Catalina, the easiest alternative would probably have been to create a bootable external USB drive running an older version of macOS (like 10.14 Mojave), but by installing 10.15 Catalina you have also installed some drastic security which prevents your Mac from booting from an external drive easily…
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How to make folder as zip file. Big Sur does not run 32-bit apps. Apple dropped support for 32-bit applications in macOS Catalina and the last macOS to support them was Mojave. You can only install 64-bit apps on Big Sur and Catalina which for most people isn’t a problem as almost all major software is now 64-bit.
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So your best option at this moment is to create a virtual machine on your Mac (hoping you have enough internal disk space available – even though you might be able to pull the trick with 16GB free memory, you should be better off with at least 32GB of free memory before you try this).
First, get yourself an official copy of the macOS 10.14 Mojave installer :
Secondly, get yourself a Virtual Machine application. I would suggest to use Oracle’s VirtualBox, as it’s FREE and the features are nearly identical to commercial Virtual Machine applications like Parallels Desktop or VMware Fusion :
Catalina 32 Bit Support
Then, install macOS 10.14 Mojave within VirtualBox. There are various guides available on doing so, but the best way is using the guide created by TobiWasHere! on installing a macOS 10.13 High_Sierra VM, which is (nearly) identical :
Run 32 Bit Apps Catalina
When done, run the macOS 10.15 Mojave VM. Then import the 32-bit application into it and run it.
As mentioned before, it’s far faster and easier to borrow a Mac that hasn’t been upgraded to macOS 10.15 Catalina if you incidentally need to run 32-bit software. And if you need to run a 32-bit application for daily use a Virtual Machine is not recommended (even though it can be done), in that case it is probably best to either use a ‘two Mac strategy’ with one running macOS 10.14 Mojave and one running macOS 10.15 Catalina, or – if you insist on using one Mac only – to run macOS 10.14 Mojave only until all applications you need have been upgraded to (or replaced by) 64-bit versions.
Good Luck !
enjoy ?
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