To update your Mac, please do the following:
Click on the Apple icon in the top left corner of your screen and click on "Software Update..."
A window will pop up and automatically check for updates
If updates are available, a window will pop up prompting you to install the selected updates; select "Install"
When the updates have been installed, you will see the following screen:
Occasionally, software updates require a system restart. If they do, instad of "Okay" in the above picture, you will see an option to "Install and restart." Select this option and your Mac will automatically log off the current user, install the updates and reboot the computer.
Click on the NetUpdate icon, or open Applications and choose "NetUpdate"
A window will open that looks like the following:
Select "OK" Then "Update"
While the updated software is installing, you will see the following window:
Once the updated files have completed installing, a window will notify you. Select "OK"
You will then be prompted to reboot your Mac. Select "Restart" or, if you are done for the day, choose "Shut Down" (it's okay if it doesn't. Some updates don't require a reboot. Your Mac will tell you what it needs to do)
Microsoft office Updates:
Open "Applications" and choose "Microsoft Auto Update"
The following windows will appear. Navigate through them
Click "Continue" again
Click "Agree" then "Install"
When installation is complete, click "Close"
Microsoft AutoUpdate will then check again for newer software. If it finds any, repeat the process. If not, Microsoft AutoUpdate will display the following screen:
You may now close Microsoft AutoUpdate. Your software is up-to-date.
Please keep in mind that any other software that you download/use needs updating as well. The easiest way to do this is to download the newest version and installing it.
You may do this by going to the providers website (i.e. to update Mozilla Firefox go to Mozilla.org and download the newest version of Firefox).
If you use a program on a regular basis, it is a good idea to check for new versions regularly.