Here's what you need to do if you want to use your Mac with the lid closed, including how to keep a MacBook awake with the lid closed or prevent it sleeping so you can continue with a download. Nov 07, 2015 If you want to turn off the display of a Mac but leave the computer running, it's easy with a few keystrokes. Doing this will turn the screen black and put it to sleep but leave the Mac on. Simultaneously press Control-Shift-Eject. If you don't have an eject key, press Control-Shift-Power.

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1. Feb 05, 2020 Under Automatic Downloads, turn on or turn off Apps. On your Mac, open the App Store. From the menu bar at the top of the screen, choose App Store Preferences. Select or deselect 'Automatically download apps purchased on other Mac computers.' On your Apple Watch, go to Settings App Store. Turn on or turn off Automatic Downloads.
2. Nov 13, 2015  Stuck on the App screen, not able to get to desktop Ok, I have looked for the solution to this problem, but all my searches find a different issue. This has now happened to 2.
3. Reset the NVRAM or PRAM on Mac. Back to Table of Contents Basic steps to solve your disappeared cursor problem. Restarting is a common solution to many problems encountered when working with Mac computers. If clicking around the screen did not recover the cursor and you are unable to restart the Mac, follow the steps below.

Touch ID is Apple's fingerprint identity sensor. It allows you to unlock your device, log in to apps, use Apple Pay, and make purchases from the App Store and iTunes by touching and briefly holding your finger against the sensor. When it works, it's magical, and you want it everywhere - your car, your house, your yacht, your one-man rocket to Mars. When it doesn't, you want to throw your iPhone (or Mac) across the room.

What can make Touch ID failures even more frustrating is figuring out why they're failing. From the outside it seems like the stereotypical black box. A fingerprint goes in and then it either works or doesn't, and if it doesn't, there's no way for us to see what went wrong, why, or how to fix it. Maddening.

There are, however, some things you can do to make it work better and more often.

How does Touch ID work?

On an iOS device, there's a capacitive ring around the Touch ID sensor; on the new MacBook Pro, the entire Touch ID sensor is capacitive. When the sensor detects a finger, it triggers a high-resolution image capture. That image is converted into a mathematical representation, which is then sent through the hardware channel to a secure enclave. If the representation matches what's stored in the enclave, a 'yes' token is released and the Touch ID action is authenticated. If not, a 'no' token is released, all you get is a digital head shake. Every time Touch ID scans a finger and recognizes it, it adds additional detail to the representation, theoretically to make it register even faster and better in the future.

Troubleshooting trippy Touch ID authentication

Here are a few tips and tricks to try if you're experiencing Touch ID issues:

• During the registration process, make sure you move your finger around enough that the entire surface gets scanned during the first stage, and then every edge gets scanned during the second phase.
• Any sweat or liquid on your finger at all can interfere with the scan. Wipe both your finger and the Home button off and dry them completely before using Touch ID.
• The sequential improvement process can sometimes go off-track (i.e. instead of getting better, an error can occur and it can get worse). When that starts to happen, delete the fingerprint and re-register.
• On an iOS device, make sure your finger is touching the capacitive metal ring and the Home button.
• Touch ID is super fast these days, but you should still refrain from lifting your finger too quickly.
• Try to keep your finger in one place when you're authenticating — you don't want to move your finger around too much.
• If you're rockin' a screen protector or case, you don't want it to cover up the capacitive ring or the Home button — that could cause errors with Touch ID authentication.
• If all else fails, it's time to head to the Apple Store for one-on-one support.

How to delete and re-add your Touch ID fingerprints

Sometimes you've just gotta burn it to the ground and start anew.

How to delete and re-add your Touch ID fingerprints on Mac

Follow these steps to delete your Touch ID fingerprints on Mac:

1. Click on the Apple menu icon in the upper left corner of your Mac's screen.
2. Select System Preferences from the drop down menu.
3. Select the Touch ID preference pane.
4. Hover over the fingerprint icon you wish to delete until you see the X in the upper left corner, then click on it.
5. Enter your password.

6. Press Delete to confirm.

Follow these steps to add your Touch ID fingerprints on Mac:

1. Click on the Apple menu icon in the upper left corner of your Mac's screen.
2. Select System Preferences from the drop down menu.
3. Select the Touch ID preference pane.
4. Click on Add a fingerprint.

5. Enter your user password.

Serenity Caldwell put together an extensive guide on Touch ID for the new MacBook Pro. You can check it out at the link below!

How to delete and re-add your Touch ID fingerprints on iOS

If you're having trouble with Touch ID on an iOS device, here's how you wipe the slate clean and start again!

1. Launch the Settings app.
2. Tap on Touch ID & Passcode.
3. Type in your Passcode when prompted.

4. Tap on any fingerprint.

5. Tap on Delete Fingerprint. Repeat this until all your fingerprints are removed.
6. Tap on Add a Fingerprint...

7. Follow the on-screen prompts to set up a new fingerprint.

Questions?

Still running into problems with Touch ID or have a question I didn't answer above? Gimme a shout — either in the comments or on Twitter!

Updated February 2017: Added new Touch ID information and update troubleshooting photos.

iOS

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Main

macOS Catalina

Main

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If your screen is black or frozen

If your screen is black or frozen, you might need to force restart your device. A force restart won't erase the content on your device. You can force restart your device even if the screen is black or the buttons aren't responding. Follow these steps:

• iPad models with Face ID: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Then press and hold the Power button until the device restarts.
• iPhone 8 or later: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Then press and hold the Side button until you see the Apple logo.
• iPhone 7, iPhone 7 Plus, and iPod touch (7th generation): Press and hold both the Top (or Side) button and the Volume Down buttons until you see the Apple logo.
• iPad with Home button, iPhone 6s or earlier, and iPod touch (6th generation) or earlier: Press and hold both the Home and the Top (or Side) buttons until you see the Apple logo.

If your device still won't turn on or start up

Plug in your device and let it charge for up to one hour.

After a few minutes, you should see the charging screen.

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Apps For The Screen Doesn't Go Off On Mac Pro

If you don't see the charging screen within an hour, or you see the connect to power screen, check the jack, USB cable, and power adapter. Make sure that everything is plugged in firmly, free of debris, and not damaged. You might want to try a different USB cable or power adapter.

If your device still doesn't turn on, see what to do next.

If your device turns on but gets stuck during start up

If you see the Apple logo or a red or blue screen during startup, try these steps:

1. Connect your device to a computer. On a Mac with macOS Catalina 10.15, open Finder. On a Mac with macOS Mojave 10.14 or earlier, or on a PC, open iTunes.
2. Locate your device on your computer.
3. While your device is connected, follow these steps:
   • iPad models with Face ID: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Press and hold the Top button until your device begins to restart. Continue holding the Top button until your device goes into recovery mode.
   • iPhone 8 or later: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Then, press and hold the Side button until you see the recovery mode screen.
   • iPhone 7, iPhone 7 Plus, and iPod touch (7th generation): Press and hold the Top (or Side) and Volume Down buttons at the same time. Keep holding them until you see the recovery mode screen.
   • iPad with Home button, iPhone 6s or earlier, and iPod touch (6th generation) or earlier: Press and hold both the Home and the Top (or Side) buttons at the same time. Keep holding them until you see the recovery mode screen.
     
4. When you get the option to restore or update, choose Update. Your computer will try to reinstall iOS or iPadOS without erasing your data.
   

Your computer will download the software for your device. If it takes more than 15 minutes, your device will exit recovery mode and you'll need to repeat steps 2 and 3.

If you need more help

Contact Apple Support to set up service if you have any of these issues:

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• You still see a black screen after charging, force restarting, or following the steps in this article.
• You see a black screen, but you can hear alerts, sounds, and vibrations.
• The screen remains black, but the device chirps when you unmute it and connect it to power.
• Your screen is on, but it doesn't respond when you tap, slide, or try other gestures.
• You can't force your device to restart because a button is broken or stuck.
• Your device is stuck on the Apple logo, displays a solid color, or isn't recognized in iTunes.