How to Find your Mac, iPhone, and iPad’s UUID

Cartoonish iPhone, iPad, Mac, and Macbook drawing.
T. Lesia/

Your Mac, iPhone, and iPad all have a Universally Unique Identifier (UUID) assigned. These codes are specific to each device and, similar to a serial number, they are used by developers to identify each one individually. Here’s what you need to know.

What is a UUID?

A UUID is a string of letters and digits that forms a unique pattern. Your Mac, iPhone, and iPad each have one UUID, and no other device shares it. It’s similar to a serial number in that regard, but whereas serial numbers are used to identify your device by Apple and your cellular carrier, developers usually use the UUID instead.

Normally, you wouldn’t need to know (or access) your UUID. But if you’re registering a device as part of the Apple Developer Program so you can install beta software, you’ll need it. App developers might also ask for your device’s UUID so that they can provide builds that will only work on that particular device.

How to Find Your Mac’s UUID

Click the Apple logo in the menu bar, and then click the “About This Mac” option.

Click the Apple Logo. Click About This Mac

Click the “System Report” button.

Cllck System Report

Note the text beside Hardware UUID.

System Report showing UUID

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How to Use iOS 12 to Enter Passwords on an Apple TV

Apple TV logo

Using the Siri Remote to enter text on an Apple TV is difficult, especially when it’s a long and complicated phrase. Instead, you can use the software keyboard on your iPhone or iPad to enter your password.

Apple’s tight ecosystem comes into its own here, and we benefit from it big time. The Siri Remote isn’t great, and entering a 12-character password with symbols, caps, and numerals is crazy-making. This feature isn’t just for passwords, either—regardless of whether you’re searching for your favorite movie or entering the world’s best password, using an iPhone or iPad’s keyboard is a much better idea.

How to Use an iPhone or iPad to Enter Text

You’ll need an iPhone or iPad running iOS 12 or later and an Apple TV running tvOS 12 or later for this to work. All devices need to be on the same Wi-Fi network and signed into the same iCloud account, too.

Navigate to a text field on your Apple TV, and you’ll receive a notification on your iPhone or iPad prompting you to open the keyboard. If the notification doesn’t pop up, you can also open the Apple TV Remote app (if you’ve never used the Apple TV remote, check out this primer to get it all set up). A keyboard will then automatically appear whenever your Apple TV is ready for text input.

RELATED: How to Use Your iPhone or iPad as an Apple TV Remote

Tap the keyboard notification

Use the keyboard as normal and enter your text.

Enter the required text using the on-screen keyboard

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How to Film With Your Own Green Screen Using Your iPhone

iMovie timeline screenshot

Blue and green screens are used by TV and movie studios to blend two videos by replacing the background with something different. You have that power on your iPhone and iPad and we’re going to show you how to use it.

Studios have used blue and green screen for a long time, but you don’t need a huge crew or expensive cameras to make them work. With just an iPhone or an iPad, you can create some spectacular effects by yourself.

How Blue and Green Screens Work

By recording a video in front of a colored screen it’s possible to make that screen appear transparent. Then a second video is placed behind the original using software, allowing it to be displayed in the screen’s place

This technique was often used to show weather maps behind television presenters, for example.

Filming with a green screen
Dmitri Ma/

How to Use a Green/Blue Screen on iPhone and iPad

Download Apple’s free iMovie app for iPhone and iPad from the App Store and open it. Tap the large “+” button to create a new project.

Tap the large "+" button to create a new project.

Tap ‘Movie” to create a new movie project.

Tap 'Movie" to create a new movie project.

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The Best Screen Protectors for iPads

Man using Apple Pencil with iPad Pro
Denys Prykhodov/Shutterstock

Want to protect your iPad and even make it more pleasant to draw on? We’ve rounded up the best screen protectors for everyone, including artists, to help keep your favorite tablet safe and sound.

Depending on how you use your iPad, there are a few different things you should look for when choosing which screen protector to buy. Big doodlers or note-takers might want one that feels like paper, whereas parents looking to protect their iPads from an overzealous toddler armed with some Hot Wheels will want a different type of protector altogether.

There are so many screen protectors available that it can be challenging to know where to start. The market is a sea of sameness, but some still manage to stand out. Here, we’ll run through our top picks, arranged by type and need.

Best Tempered Glass Screen Protector: amFilm Glass Screen Protector (From $10)

amFilm screen protector

Screen protectors can be costly, but it’s possible to get a quality product without spending big. The amFilm Glass Screen Protector is one such example of that. It ships with two protectors in the box, which can be of real benefit if you are concerned about getting the application right the first time. It also gives you a backup when the original is damaged.

The amFilm screen protectors are very popular and with good reason. At less than $10 for two and 99.99% clarity, it’s difficult to knock. It’s super thin at just 0.33mm thick as well, ensuring reliable protection without removing you from your apps and content.

Ultimately, this is the best iPad screen protector for most people, and if you have two iPads to protect, it’s even more of a bargain. We like tempered glass screen protectors because they retain the firm smooth feel of the iPad beneath, but if you’d prefer something made of film, read on.

The button below will take you to the screen protector for 9.7-inch iPads, but you can also get the same protector for the iPad Pro in both 11-inch and 12.9-inch sizes, as well as the iPad mini.

Best Film Screen Protector: amFilm Flex Film (From $7)

amFilm screen protector

Not everyone wants to affix a sheet of glass to the front of their iPad. It can add weight—although not a lot—and some might be concerned about them breaking. We’ve never seen a tempered glass screen protector shatter to bits (without taking the rest of the iPad with it, that is) but if that’s a concern for you, the amFilm Flex Film is the way to go.

You may notice this is amFilm’s second appearance in our list, and it’s with good reason—their film screen protectors are just as great a value as their glass ones. The flexible film works perfectly with the Apple Pencil, and with great clarity and high-quality materials, it’s easy to recommend amFilm once again.

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How to Select an Exact Display Resolution on Your Mac

Mac resolution header

You can change the display resolution of your Mac to make text larger or gain more space. There are some predefined scaled resolutions available, but you can get more granular control over your display’s resolution.

Normally a Mac will run its display at the resolution Apple believes is best. There are also four or five different options—depending on your Mac and display and highlighted below—that provide different outcomes. They’re fine, but they’re options to make text bigger or your desktop larger without using the number-based resolutions we all understand. But if you do some digging, you can get some real control over your display by making actual resolutions available to you.

Default scaled display options


RELATED: How to Run Your Retina Display at its Native Resolution

Why is Display Resolution Important?

A display’s resolution is the number of pixels available both horizontally and vertically. A 4K display has a resolution of 3840 x 2160 pixels, or 3840 pixels horizontally, and 2160 pixels vertically.

How much information you can see on-screen at any given time is governed by its resolution. Higher resolutions mean that more things can be shown on-screen. Those things could be windows, icons, photos, or text in a document. Because of the larger resolution, however, that also means all on-screen elements are smaller, which is something else to consider.

Larger displays usually also have higher resolutions than smaller ones, especially if they are of good quality.

What Makes Retina, Retina?

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