Use Shift-Command-5

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If you're using macOS Mojave or later, press Shift-Command (⌘)-5 on your keyboard to see onscreen controls for recording the entire screen, recording a selected portion of the screen, or capturing a still image of your screen. You can also record the screen with QuickTime Player instead.

Record the entire screen

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1. Click in the onscreen controls. Your pointer changes to a camera .
2. Click any screen to start recording that screen, or click Record in the onscreen controls.
3. To stop recording, click in the menu bar. Or press Command-Control-Esc (Escape).
4. Use the thumbnail to trim, share, save, or take other actions.

Record a selected portion of the screen

1. Click in the onscreen controls.
2. Drag to select an area of the screen to record. To move the entire selection, drag from within the selection.
   
3. To start recording, click Record in the onscreen controls.
4. To stop recording, click in the menu bar. Or press Command-Control-Esc (Escape).
5. Use the thumbnail to trim, share, save, or take other actions.

Trim, share, and save

After you stop recording, a thumbnail of the video appears briefly in the lower-right corner of your screen.

• Take no action or swipe the thumbnail to the right and the recording is automatically saved.
• Click the thumbnail to open the recording. You can then click to trim the recording, or click to share it.
• Drag the thumbnail to move the recording to another location, such as to a document, an email, a Finder window, or the Trash.
• Control-click the thumbnail for more options. For example, you can change the save location, open the recording in an app, or delete the recording without saving it.

Change the settings

Click Options in the onscreen controls to change these settings:

• Save to: Choose where your recordings are automatically saved, such as Desktop, Documents, or Clipboard.
• Timer: Choose when to begin recording: immediately, 5 seconds, or 10 seconds after you click to record.
• Microphone: To record your voice or other audio along with your recording, choose a microphone.
• Show Floating Thumbnail: Choose whether to show the thumbnail.
• Remember Last Selection: Choose whether to default to the selections you made the last time you used this tool.
• Show Mouse Clicks: Choose whether to show a black circle around your pointer when you click in the recording.

Use QuickTime Player

1. Open QuickTime Player from your Applications folder, then choose File > New Screen Recording from the menu bar. You will then see either the onscreen controls described above or the Screen Recording window described in the following steps.
2. Before starting your recording, you can click the arrow next to to change the recording settings:
   
   • To record your voice or other audio with the screen recording, choose a microphone. To monitor that audio during recording, adjust the volume slider (if you get audio feedback, lower the volume or use headphones with a microphone).
     
   • To show a black circle around your pointer when you click, choose Show Mouse Clicks in Recording.
     
3. To start recording, click and then take one of these actions:
   • Click anywhere on the screen to begin recording the entire screen.
   • Or drag to select an area to record, then click Start Recording within that area.
4. To stop recording, click in the menu bar, or press Command-Control-Esc (Escape).
5. After you stop recording, QuickTime Player automatically opens the recording. You can now play, edit, or share the recording.

Learn more

Mac Screen Natural Light Apparel

• When saving your recording automatically, your Mac uses the name ”Screen Recording date at time.mov”.
• To cancel making a recording, press the Esc key before clicking to record.
• You can open screen recordings with QuickTime Player, iMovie, and other apps that can edit or view videos.
• Some apps, such as DVD Player, might not let you record their windows.
• Learn how to record the screen on your iPhone, iPad, or iPod touch.

Using your Mac after sunset may be keeping you up. Even at its dimmest setting, the kind of light given off by its LED display can affect your ability to fall asleep. Changing the warmth or color temperature may help and there’s free software that can do it automatically, called F.lux.

A lot of science has gone into the study of sleep, most likely because there are a lot of us not getting any. It could be that we’re not getting enough sleep, or it takes too long to fall asleep, or we can’t stay asleep. Maybe the sleep just isn’t restful. We go to great lengths for a good night’s sleep from simple ear plugs and eye-masks, to expensive mattresses, sleeping pills and even breathing machines.

What the latest science is learning, however, is that our electronic devices may be keeping us up, and it’s not because we can’t get past the next level in Angry Birds. The prime suspect they’re investigating is the light from electronic displays: specifically the blue wavelengths generated by today’s flat-panel LED displays. Our Macs use them. iPads, iPods and iPhones use them. Think about it: That’s hundreds of millions of devices capable of disrupting normal, healthy sleep!

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Turns out those blue wavelengths of LED light do a great job of simulating daylight, much better, in fact than fluorescent light, regular incandescent light or the original artificial light, fire. Go back as far as you care to in human evolution, and you’ll find that we’ve never been exposed to this much convincing daylight after sunset.

A few developers have come up with a free (and patent pending) method of addressing this, called F.lux, a free download. Available for OS X PPC/Intel (and compatible with Lion) as well as Linux and Windows, F.lux runs in the background and adjusts the color temperature (red or blue) of your display depending on the time of day and your location. As the sun sets wherever you are, F.lux warms up the color of your display, gradually removing the blue wavelengths.

The F.lux preferences window

F.lux lives in your menu bar. Tell F.lux how you’d like your display to look night and day, then tell it where you are (It can use OS X Location Services). F.lux will then determine when sunrise and sunset is. You can transition quickly (20 seconds) or gradually (1 hour) and preview the results. There are also presets that match real-world lighting (tungsten, halogen, fluorescent and daylight).

For those of you that need to do color accurate work, you’ve not been forgotten. There’s a setting to disable F.lux for one hour at a time. The developer plans to add the ability to allow for automatic disabling of F.lux when using certain apps, so its auto-updating ability should ensure you get the new features as soon as they’re available.

Using F.lux, I’ve noticed that reading on my MacBook Pro before bed makes me tired the same way reading a book might. Perhaps it’s a placebo effect, but I don’t recall that happening in the past. Watching videos when F.lux is active hasn’t been an issue for me, but again, you can easily disable it an hour at a time.

Now, don’t go pulling out your iPad or iPhone and potentially ruining a good night’s sleep…until there’s an app for that.