With the arrival of macOS Catalina, Apple's transition towards 64-bit technology is complete. Starting with macOS Catalina, 32-bit apps no work on your computer. With that being said, there are some workarounds to consider if you happen to have older software that's essential for work or play. Think VM!
Without going into too much detail—if you want the nitty gritty, you can read this webopedia article that explains what is 64-bit computing—64-bit apps allow your Mac to do more, and do so more quickly. Bits are calculated as powers: one bit is 1, two bits is 2, four bits is 8, and so on. Download Skype for Windows, Mac or Linux today. Get Skype, free messaging and video chat app. Conference calls for up to 25 people. Download Skype for Windows, Mac or Linux today. This site uses cookies for analytics, personalized content and ads. By continuing to. 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.
Do this first
Before doing anything else, you should check with the app developer to see if a 64-bit version of your software title is available. The transition to 64-bit technology was a lengthy one for Apple and the odds are high that your developer did make the switch.
Do you have 32-bit apps installed on your system?
Oct 09, 2019 32-bit apps can run on a 64-bit system as they've been doing for years, but Apple wants to get rid of outdated apps to make sure everything that runs on the Mac is properly optimized and isn't an. Mar 20, 2001 Windows has some 16-bit things here and there lying around in the cruft that has accumulated since Win 3.1 ran on top of DOS. Back in the early nineties, many PCs used 16-bit chips. Windows 2000 will be the first version of Windows that gets rid. How to Check for 32-bit Apps on Mac. Click the Apple icon in the top left corner. Select About This Mac. Select System Report 4. In the left menu, scroll down to software and select. Recently Apple revealed support for 32-bit apps on macOS will soon be phased out of the operating system. Users on the latest version of the OS are seeing a warning dialog when opening 32-bit apps. You probably have some 32-bit apps on your computer. This article will show you how to check for 32-bit apps on your Mac.
Moving on, you can confirm whether you have 32-bit apps on your Mac by:
- Choose the Apple icon on the Mac toolbar.
- Click About This Mac.
- Select System Report.
Select Legacy Software in the sidebar. All legacy software is 32-bit.
Use virtualization to run your old apps
Here's a look at the best ways to run older software on your Mac.
Running older software
The issue with running old versions of software is that it can eventually 'break' and not function on a future version of the OS you are running it on. You can hope that the vendor of your application will keep on updating the software to run on future OS updates, but what if you have a very specific program that is no longer maintained? Or perhaps you have a software license for your current version of an application but upgrading to a more modern version introduces too great a cost?
Running a virtual machine
16 Bit Apps On Mac Computer
One possible solution to the 32-bit application dilemma is to run a version of the latest macOS that fully supports your app in a virtual machine. A virtual machine, or VM, is an emulated computer running on top of your current OS installation as a program. The VM takes resources from your actual computer and uses them to run itself in a contained environment as a separate system altogether. Think of it like the Matrix where the real world is your physical computer and the 'dream' world in the VM.
Benefits of a VM
Since you needn't buy new hardware, you can simply run an instance of the macOS version that will run your application without issue regardless of that app being 32 bit or 64 bit for as long as you keep your VM. If you upgrade the macOS on your physical Mac, the VM version is completely separate from that process so you'll still be able to keep the 'old' macOS on the VM and run the 'new' macOS for all of your other up-to-date programs. You'll be able to have your proverbial cake and eat it too.
Setting up a VM
There are a few options for VM software solutions for you to choose from. You can run Virtualbox, VMware, QEMU, and Parallels. All of the non-open source VM managers have free 'lighter' versions that will serve our purpose but you can get their full fledge versions that provide various features that are beyond the scope of this article.
We will be using Parallels Lite that is freely downloadable from the App Store. We chose Parallels Lite due to their ease of setup and ability to function on top of a macOS host passing system information that is needed for the guest macOS to properly install. Note that if one day you'd want to change your Mac's operating system to Windows or Linux then you'd might want to install one of the other mentioned VM managers since those can run on those host OSs albeit with a much more involved setup.
We will also be using macOS High Sierra as the installed OS. You can use these instructions for older versions as well. Credit to Howtogeek.com for the command line bits to make a disk image to install macOS High Sierra from their Virtualbox install instructions on Windows 10.
- Download Parallels Lite from the App Store.
Download (but do not install) macOS High Sierra.
We need to create the install image so we need to start Terminal.
- In Terminal in your home directory type or copy and paste line by line the following:
- hdiutil create -o HighSierra.cdr -size 7316m -layout SPUD -fs HFS+J
- hdiutil attach HighSierra.cdr.dmg -noverify -nobrowse -mountpoint /Volumes/install_build
- asr restore -source /Applications/Install macOS High Sierra.app/Contents/SharedSupport/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase
- hdiutil detach /Volumes/OS X Base System
- hdiutil convert HighSierra.cdr.dmg -format UDTO -o HighSierra.iso
- mv HighSierra.iso.cdr HighSierra.iso
- Start Parallels Lite.
- Select Linux only.
- Click Continue.
- Select Install Windows or another OS from a DVD or image file.
Click Continue.
- Select Image File.
- Click Select a file.
- Navigate to your home directory and select the HighSierra.iso file we created in terminal.
- Click Open.
- Click Continue.
- Select macOS as the operating system type.
Click OK.
- Navigate to the folder to house the VM.
- Click Select.
Name your VM and click Create.
- You can optionally set up any VM options you desire such as (note that these can be changed later too):
- Startup and sharing settings in the Options tab.
- Choose CPU, memory and graphic options in the Hardware tab.
- Still under the Hardware Tab select the CD/DVD sub-option.
- Click the dropdown arrow for Source.
- Select Chose an Image File.
- Navigate to your home folder and select the HighSierra.iso file we created in terminal.
- Select Open.
- Select Continue.
- You can now Start the VM.
- Install macOS like you would normally do on any real system
Once you have a completed install, you'll want to install the Parallels Tools program in your VM macOS. This will allow you to be able to seamlessly use your mouse between your real desktop and your VM desktop as well as resize your VM screen on the fly with proper display attributes.
- Click the highlighted yellow exclamation point over your VM window.
- Click Continue.
On your VM, double-click the Parallels Tools installer that opens.
- Complete the installation and reboot your VM.
Final comments
You now have a full-fledged macOS installation that you can keep for your older 32-bit applications once macOS decides to give them the boot. You'll be able to make snapshots of the VM to have different save states. You'll be able to run all native macOS applications you normally do. The drawback will be the speed of execution and disk speed but if you have a powerful Mac, you may not notice too much of a difference depending on the application. Does this solution work for you? Tell us what you'd rather see happen for 32-bit applications on macOS in the comments!
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Apple began transitioning to 64-bit hardware and software technology for Mac over a decade ago, and all modern Macs now include powerful 64-bit processors that can run advanced 64-bit apps. These apps can access dramatically more memory, enable faster system performance, and take advantage of technologies that define today's Mac experience, such as Metal graphics acceleration.
Run 16 Bit On 64 Bit
Apple has been working with developers to transition their apps, and in 2018 Apple informed them that macOS Mojave would be the last version of macOS to run 32-bit apps.
Apple's transition to 64-bit technology is now complete. Starting with macOS Catalina, 32-bit apps are no longer compatible with macOS. If you have a 32-bit app, please check with the app developer for a 64-bit version.
Opening 32-bit apps
When you attempt to open a 32-bit app, you will see an alert that the app needs to be updated to work with this version of macOS, or that the app is not optimized for your Mac and needs to be updated.
macOS Catalina
macOS Mojave and macOS High Sierra
If you haven't upgraded to macOS Catalina, you can still open and use the app, but you should check with the app developer for a 64-bit version that also works with the latest macOS.
How to find 32-bit apps on your Mac
System Information can find 32-bit apps that are installed on your Mac:
- Choose Apple menu > About This Mac, then click the System Report button.
- Select Legacy Software in the sidebar. All legacy software is 32-bit.
- If you don't see Legacy Software in the sidebar, select Applications in the sidebar, then check the list of apps on the right. The column labeled ”64-Bit (Intel)” shows ”No” for apps that are 32-bit.
When upgrading to macOS Catalina, the installer shows a list of recently used apps that are 32-bit. You can review this list before choosing whether to cancel or continue the installation:
macOS Catalina also shows a prohibitory symbol over the icon of each 32-bit app in the Finder, letting you know that the app will not open.
How to contact the app developer
The developer (or vendor) is the person or company that made the app. The easiest way to find contact information for an app's developer is to search the web for their name or the name of their app. Learn more about contacting third-party vendors.
To find the name of the developer:
- Select the app in the Finder.
- Choose File > Get Info from the menu bar.
- Look for copyright information in the Info window. For example, Apple is the developer of this app: