2. Right click on the QuickTime Icon in your Dock. And select 'New Movie Recording' from the list.

3. Your Webcam will open a new window. Adjust the size of that window and place it in the bottom corner of your screen as seen below.

4. We won't this webcam window to stay open while we click on other windows. So go up to the top toolbar. Select View > Float On Top

5. Next right click on the QuickTime icon again and this time select 'New Screen Recording'

6. A new Screen Recording Toolbar will appear on the screen. First make sure the 'Record Entire Screen' Option is selected.

7. Next make sure your Microphone is set correctly by clocking 'Options'
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8. Now you are all set up and can click the 'Record' button on that Screen Recording Toolbar. Once you begin the recording you will see an Icon appear in your Mac Toolbar as seen below.
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9. When you are finished presenting, click that 'Stop' Icon in the Toolbar and the Screen Recording will stop and will save that recording onto your desktop.