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.
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. Starting with macOS Catalina, 32-bit apps are no longer compatible with macOS.
If you get an alert about a 32-bit app
You will see one of these alerts when attempting to open a 32-bit app:
- The Mac operating system has been 64-bit for several years. Unlike for Windows, there's no choice between running a 32-bit or 64-bit version of the Mac operating system. Similarly, we won't offer a choice between 32-bit and 64-bit versions of Office 2016 for Mac.
- Word, Excel, PowerPoint, Outlook, OneDrive, Skype for Business, and OneNote will install and run on macOS 10.14 Mojave. Microsoft fully supports Office 2016, Office 2019 and Microsoft 365 for Mac on 10.14 Mojave when you have the following Office updates installed: Microsoft 365/2019 - Build 16.17.0 or later. Office 2016 - Build 16.16.2 or later.
32-bit app compatibility with macOS High Sierra 10.13.4 and later 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.
Microsoft Office 64 Bit Compatibility For Mac Os 10.13.4 Update
[app name] needs to be updated.
The developer of this app needs to update it to work with this version of macOS. Contact the developer for more information.
The developer of this app needs to update it to work with this version of macOS. Contact the developer for more information.
[app name] is not optimized for your Mac and needs to be updated.
This app will not work with future versions of macOS and needs to be updated to improve compatibility. Contact the developer for more information.
This app will not work with future versions of macOS and needs to be updated to improve compatibility. Contact the developer for more information.
When installing macOS, you may see a list of recently used apps that are 32-bit. You can review this list before deciding to continue installation. You may also see a prohibitory symbol over the icon of each 32-bit app in the Finder, letting you know that the app will not open.
Microsoft Office 64 Bit Mac
For all 32-bit apps, please contact the developer of the app to learn whether an updated version of their software is available or planned.