How to Check for and Install Updates on a Mac Computer

Click on the Apple icon that appears on the left hand side of the menu bar at the top of your screen.
Select, 'Software Update' from the drop down menu that appears.
Wait for the computer to perform a check for any software updates. You will need to have Internet access for your Mac to be able to check for software updates, so make sure that you have this.
Close out of the Software Update screen if there are no software updates for your computer at that time.
Select the software updates that you wish to install on your Mac computer from those listed by checking or unchecking the boxes that appear next to each update.
Click 'Install' at the bottom of the Software Update screen and wait for the computer to install the software updates that you have selected.
Restart your computer after closing all open programs so that all the software updates can take effect.
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