If you are a user of OS X Mavericks and use Quicktime to record screencasts and whatnot, you may have noticed that Quicktime appears to no longer have the option to pause your recording. The truth is that the functionality is still there, but it is just very well hidden.
During your recording, if you would like to pause the recording, follow these steps:
1) Click on the Quicktime icon in your app bar:
2) Press the “esc” (escape) key
At this point, you will see the control window for Quicktime, and then you will notice it only has a stop button – not a pause button.
3) Hold down the “alt” key and you will now see a pause button
If your video is already paused, you will then see the record (red) button which allows you to continue. If you with to simply stop the video, hold down the “alt” key and press stop.