How do I know what version of Windows and Macintosh I Currently Have on My Computer?

Operating System - Determining the Version

This document will help users determine the version of their Operating System. Instructions for both Mac and Windows Operatins Systems are listed.

Preform the following to determine which operating system version you are using:

There are several ways to determine the OS version on a Windows based computer.

The easiest is usually done by a right-click on the My Computer icon on the desktop and then choose Properties
This same screen can be found by going to Start --> Settings --> Control Panel (or in XP Start --> Control Panel) and open up the System icon.
Your system version will be displayed in the window that appears.
If your computer is running Windows NT, 2000 or XP you need to follow these additional steps to find the exact version including Service Pack Numbers.
1. Click on Start.
2. Select Run.
3. In the Open field, type winver and click OK.
This will bring up a dialog box with the Windows version and service pack information.
For more detailed information most Windows computers come with a system information tool. If available it can be found under Start --> Programs --> Accessories --> System Information . This can get exact version numbers for Windows and other programs.

OS 9 and earlier:

For General Information:

Make sure the Finder is currently selected. If this is the case the word "Finder" will appear in the upper right corner. (If this is not the case click on whatever program appears there and select Finder from the list that appears.)
With the Finder selected, click on the Apple Menu and select About this computer... or About this Macintosh....
Your version information will be display in the window that appears.

For more detailed information you can bring up the Apple System Profiler by:

Clicking on the Apple Menu and selecting Apple System Profiler This will contain more specific details about your computer the the above steps.

OS X

Make sure the Finder is currently selected. If this is selected the word Finder will appear in bold right to the right of the Apple in the top left corner of the screen.If this is not the case, click somewhere on the desktop until Finder appears there)
Click on the blue Apple menu, and select About This Mac
Your version of OSX should appear on the Window that appears. (i.e. 10.1, 10.2, 10.3, 10.4, etc.)

For more detailed information you can bring up the Apple System Profiler by:

With the Finder still selected, open and folder
Click on the Applications icon at the top of this screen. (Can also be found by pressing Apple - Option and the A key all at the same time)
Find and double click on the Utilities folder
Double click on the Apple System Profiler icon This will contain more specific details about your computer the the above steps.