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Office for Mac 2011 installation error: "This software requires Mac OS X version 10.5.x"

Symptoms
When you try to install Microsoft Office for Mac 2011, you receive the following error message: 

Software Requirements
This software requires Mac OS X version 10.5.x or later.






Cause
This behavior can occur if you do not have the latest MAC OS update installed. 

Office for Mac 2011 requires Mac OS X 10.5 Leopard, or a later version, and an Intel processor. 
Resolution
To resolve this issue, follow these steps:

Step 1: Quit all programs and close all windows

You must quit all applications before you begin Office for Mac 2011 installation. To quit an application, select the application on the toolbar (top), and then select Quit. If you cannot quit an application or do not know how, hold down the Command and Option keys, and then press Esc on your keyboard. Select the application in the "Force Quit Application" window, and then select Force Quit. Click Force Quit to quit the application.

Note You cannot quit Finder.

When you are finished, click the red button in the upper-left corner. 

Step 2: Make sure that the computer meets the minimum system requirements

To determine whether your computer meets the minimum system requirements for Office for Mac 2011, follow these steps:
  1.  On the Apple menu, select About This Mac.

  2. The "About This Mac" window will display the version and the processor type. If the processor is not an Intel processor, see the following Microsoft Knowledge Base article for more information about the processor requirements for Office for Mac 2011:
    2405857  Installing Office for Mac 2011 error "This software requires an Intel-based Macintosh computer"  
     
If you have an Intel processor, continue to "Step 3."

Step 3: Install the latest Apple update

  1. Click the Apple menu, and then select Software Update. The Software Update window will open and check for available updates.


  2. If software updates are available, click Continue.


  3. Click Agree. The download will begin.


  4. When you are prompted to restart, click the Restart button. Restart your computer, and then again try to install Office 2011.

For more information about how to obtain Apple updates, visit the following Apple website: 


More information
For more information about Office for Mac 2011 system requirements, click the following article number to view the article in the Microsoft Knowledge Base:  
2581812  Microsoft Office for Mac 2011 system requirements  

For more information about updates, visit the following Apple website:


Properties

Article ID: 2405735 - Last Review: 06/21/2014 14:31:00 - Revision: 7.0

  • Microsoft Office for Mac Home and Business 2011
  • Microsoft Office for Mac Home and Student 2011
  • dftsdahomeportal KB2405735
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