fixed : need to run old 32-bit app in macOS 10.15 Catalina once or twice

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 :

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…

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 :

  • search online for the official macOS 10.14 Mojave installer on iTunes / the App Store, or use this link to download :   https://apps.apple.com/sk/app/macos-mojave/id1398502828?mt=12
  • the AppStore.app will now automatically open on your Mac on the right page
  • click the GET button
  • now System Preference’s Software Update window will open with a pulldown window asking you if you are sure you want to download macOS Mojave (since you are running from macOS Catalina even macOS knows that normally doesn’t make sense) click the Download button
  • when the installer has been downloaded completely, it will automatically run – however, since your Mac is already running a newer version of macOS (you are running macOS 10.15 Catalina) you will get an error window saying ‘this copy of the “Install macOS” application is too old to be opened on this version of macOS’ so you will only be able to click the Quit button
  • then open a Finder window to check where the Install macOS Mojave application is located (it should be located in the Applications folder)

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 :

  • go to https://www.virtualbox.org and download VirtualBox
  • since you are ultimately trying to run 32-bit software, you might be tempted to download VirtualBox 5.2 which is the last version to run on 32-bit hosts ; there is nothing against doing so, but VirtualBox 6 should do great as well, since your Mac is capable of running macOS 10.15 Catalina ; it’s just the VM you’re trying to install (Mojave) that needs to be 32-bit capable, not the host (your Mac running Catalina)
  • install VirtualBox
  • run Virtual Box

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 :

VirtualBox: How to create a macOS High Sierra VM to run on a Mac host system

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 😉

fixed : burn .iso to bootable Windows DVD-R in OSX 10.11 El_Capitan

Question :

As I need to install Windows in Boot Camp mode on my Mac, I’m trying to burn an .iso disk image of Windows 7 onto a DVD-R from within OSX 10.11 El_Capitan.

But when I right-click on the .iso-file and select “Burn Disk Image “windows-7.iso” to Disc” from the popup-list,  everything seems to go okay, but I end up with a DVD-R with just the .iso-file on it…

It’s not a bootable DVD-R of Windows 7 as I was intending to do… what is wrong ?

 

Answer :

In OSX 10.11 El_Capitan the procedure for doing this has slightly altered compared to previous versions of OSX :

  • right-click on the .iso-file and select “Open With” and then “DiskImageMounter(default)” from the popup-list
  • now the .iso will mount in the Finder
  • then start the Disk Utility application
  • in the window that opens, select the mounted .iso from the list on the left ; it’s listed with an unpronounceable name under “Disk Images”
  • then, in the top menu bar of the screen, go to “Images” and choose “Convert…” from the pulldown list
  • in the pulldown window that opens, select the original .iso-file and click “Open”
  • in the next pulldown window, at “Save As:” replace the temporary Untitled-name with the unpronounceable name of the mounted .iso you’ve seen before
  • then, at “Where:” choose a destination to create the converted .iso-file, and make sure “Encryption:” is set to “none” and “Image Format:” is set to “DVD/CD master” ; then click “Save”
  • now, a .cdr-file will be created in the location you selected at “Where:”
  • right-click on the .cdr-file and select “Burn Disk Image “[name].cdr” to Disc”
  • in the window that opens, select your SuperDrive (or external DVD-burner) and click on the triangular arrow at the far right side
  • the window will be extended, and at “Burn Options” choose the slowest speed possible (if this option is greyed-out, leave it as-is), and at “After Burning” choose “Verify burned data”
  • then put a DVD-R in your Superdrive (or external DVD-burner) and click “Burn”
  • now, the end result will be a bootable Windows installer-DVD

enjoy !

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