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Messenger for Mac 5.1.1 makes it easy to take advantage of the full power of instant messaging and incorporates improvements to corporate accounts.

Messenger for Mac 5.1.1 makes it easy to take advantage of the full power of instant messaging and incorporates improvements to corporate accounts. This update allows users of Messenger for Mac to view icons for contacts of other Messenger clients, ability to suppress saving conversation history, detect multiple points of presence, and improve the stability of corporate accounts using the Microsoft Office Live Communications Server service.

By using Messenger for Mac, you can see when your friends, family, coworkers, and associates at other companies are online and then communicate with them instantly. Messenger for Mac offers two types of communication services — a personal account and a corporate account. A personal account works with the MSN® Messenger service on the Microsoft Passport Network. Contacts that you add to your personal account include friends and family members. A corporate account uses the Microsoft Office Live Communications Server service. Contacts that you add to your corporate account include coworkers who are in the same company as you and associates at other companies. Instant message conversations with other corporate account users are not limited to corporate users who have Messenger for Mac installed on their computers. With the federation features enabled on Live Communications Server, users can also have instant message conversations with users who have other instant messaging services, such as AOL Instant Messenger (AIM), Yahoo Messenger, and iChat users who are signed in with AOL accounts.

Files

Status: Deleted This download is no longer available on microsoft.com. The downloads below are archives provided by the Internet Archive Wayback Machine from the Microsoft Download Center prior to December 2012.

Supported operating systems: Mac OS X

To use Microsoft Messenger for Mac 5.1.1, your computer must meet the following minimum requirements:

Processor: Mac OS X-compatible processor that is a model G3 or higher
Operating system: Mac OS X version 10.3 or later
Network access: Microsoft Office Live Communications Server 2005 (corporate accounts only)
Memory: 128 MB of RAM
Hard disk: 20 MB of hard disk space
Display: 1024 x 768 or higher resolution displaying thousands of colors
Internet access: Required. Internet access might require you to pay a separate fee to a service provider; local and long-distance telephone charges might apply.

Before you install Messenger for Mac

• Important   Make sure that your Mac OS X user account has read and write access.

1. Print this page if you want to use it as a reference when you are offline.
2. Make sure your computer meets the minimum system requirements.
3. Click the Download button.
4. Follow the instructions on the screen.
   If you are using Safari, the file is downloaded to the desktop unless you specified a different folder in the Preferences dialog box of Safari. (To check your preferences, on the Safari menu, click Preferences, and then click General.)
   If you are using Internet Explorer, the Download Manager saves the file to the desktop unless you specified a different folder in the Preferences dialog box of Internet Explorer. (To check your preferences, on the Explorer menu, click Preferences, and then click Download Options in the left pane).
5. If the file you downloaded does not expand automatically, on your hard disk, double-click the file that you downloaded in step 4.
6. To copy Messenger for Mac to your hard drive, drag the Microsoft Messenger icon to the location where you would like to save it. Then, double-click the Microsoft Messenger icon to start the setup program.
7. Click Next.
8. Read the .NET Messenger Service Terms of Use and, if you accept these terms, click Next, and then click Accept.
9. Follow the instructions on the screen.

1. Quit Messenger for Mac if it is running.
2. On your hard disk, locate the Microsoft Messenger application.
3. Drag the Microsoft Messenger application to the Trash, and then empty the Trash.
4. To remove your existing Messenger for Mac preferences, delete the following files in the correct User/Library/Preferences/Microsoft folder:
   • com.microsoft.Messenger.plist
   • com.microsoft.MessengerDaemon.plist
   • Microsoft Messenger User Cache
5. To remove all Messenger for Mac files completely from your computer, delete the following folders in the Documents/Microsoft User Data folder:
   • MSN Messenger History
   • Messenger Corporate History
   • Microsoft Messenger Data
   • Messenger Corporate Data