Microsoft Office Compatibility with Mac OS X Yosemite 10.10.5
Question details
The user needs to know which versions of Microsoft Office can be installed and run on a late-2009 iMac running Mac OS X Yosemite 10.10.5.

- Product
- Microsoft Office for Mac
- Device & OS
- Mac OS X Yosemite 10.10.5
- Scenario
- Attempting to install or use Microsoft Office software on an older Mac operating system.
- Observed behavior
- Current versions of Microsoft 365 and Office 2019 fail to install because they require newer macOS versions, leaving the user unable to run the latest software.
Verify your exact Mac model and OS version by clicking the Apple menu and selecting 'About This Mac' to confirm whether your device can be upgraded to a newer macOS.
Install Office for Mac 2016
Office 2016 is the latest version of Microsoft Office that officially supports Mac OS X 10.10 Yosemite.
Current Microsoft 365 and Office 2019 applications only support the three most recent macOS versions. For OS X 10.10, Office 2016 is the maximum compatible release.
Locate a valid Microsoft Office 2016 for Mac installation file and product key from your Microsoft account purchase history.
Run the downloaded installer package and follow the on-screen prompts to install Word, Excel, and PowerPoint on your Yosemite system.

Upgrade Your macOS Version
If your Mac hardware permits, upgrading your operating system allows you to install and run newer Microsoft Office versions.
Use a Third-Party Office Suite Alternative
Install an alternative office suite that remains compatible with older Mac operating systems while supporting modern Office file formats.
Use WPS Office for Older Mac Systems
If Microsoft Office no longer supports your Mac OS X Yosemite, WPS Office is an excellent, free, and lightweight alternative. It provides a familiar user interface, strong compatibility with legacy operating systems, and seamless support for modern document formats without requiring a costly hardware upgrade.
- 1. Download WPS Office for Mac: Visit the official WPS website and download the macOS installer package.
- 2. Install the Application: Open the downloaded .dmg file and drag the WPS Office icon directly into your Mac's Applications folder.
- 3. Open and Edit Files: Launch WPS Office from your Launchpad to immediately open, edit, and save your existing Microsoft Office documents.

Frequently Asked Questions
Can I run Microsoft 365 on Mac OS X Yosemite 10.10.5?
No, Microsoft 365 applications only support the three most recent versions of macOS. You cannot install or run them on OS X Yosemite.
Is Microsoft Office 2011 compatible with OS X 10.10.5?
Yes, Office for Mac 2011 is technically compatible with OS X Yosemite. However, it is a 32-bit application and reached its end of support many years ago, meaning it poses security risks and lacks modern features.
How can I open .docx and .xlsx files on my older Mac without Microsoft Office?
You can use compatible third-party office suites like WPS Office, LibreOffice, or Apple's built-in iWork suite (Pages, Numbers) to open and edit modern Microsoft Office file formats on older Mac systems.
Is it safe to use Office 2016 on Mac OS X Yosemite?
While Office 2016 functions on Yosemite, it reached its official end of support in October 2020. It no longer receives security updates, making it potentially vulnerable to emerging security threats if connected to the internet.




