NASA consistently produces stunning and inspiring imagery of our Earth, solar system, and universe, many of which make for exceptional wallpapers for our desktops and home screens, and these new images of our home planet at night are no exception.

From NASA’s Goddard Space Flight Center, these four high resolution images show Earth and the major habitation sights of humans glowing from light pollution, showing where the cities and population centers are on the planet. The images focus on several regions but here we are focusing on four primary compositions: North America and the USA, Europe and Africa, Asia, and the Americas.

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Did you now that QuickTime on the Mac can join movie clips together into a single combined movie file?

The same QuickTime that is used for viewing videos on the Mac includes some basic editing functions, including the ability to combine multiple video files into one.

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Many Mac users sort their files by name and type, but one of the most useful ways to sort files is by date. The Mac Finder allows for various different date based sorting options for files, documents, applications, and folders, and they’re all typically best utilized in the Finder List view.

Using date based sorting in Mac OS, you can sort files by “Date Modified”, “Date Created”, “Date Last Opened”, and “Date Added”. If you’ve never used these features before, or perhaps just forget they exist, this tutorial will walk through how you can use date based file system sorting on your Mac.

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Most iPhone and iPad users already have one email account setup on their iOS device, but you can easily add a new email address to the iPhone or iPad, or even multiple new email addresses to the same device, all to be managed in the same Mail app of iOS. This is nice for those of us who juggle multiple email accounts for personal, work, and other purposes.

This tutorial will walk through adding and setting up new email accounts or additional email addresses on the iPhone or iPad. After a new email account is setup and configured in iOS, you can check emails, send, receive, reply, forward, and perform any other email functions from all of the addresses on the device.

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Some Mac users may want to clear caches and clean out temporary files from Mac OS. Caches and temporary files can include things like web browser cache and history, messaging cache, app specific temp files and caches, partially completed downloads, and much more. While most apps will handle cache management on their own, and Mac OS will handle some other cache type files directly too, more advanced users can manually intervene and clear out their own cache and temporary files from a Mac as well.

This walkthrough will show you how to manually clear and clean out caches and temporary files from the active user on a Mac. There are no downloads or third party tools required.

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Beta testers of Apple system software will find new versions of the software updates available to eligible Macs, iOS devices, Apple Watch, and Apple TV.

MacOS 10.12.5 beta 3, iOS 10.3.2 beta 3, tvOS 10.2.1 beta 3, and watchOS 3.2.2 beta 3 are all available through their respective software update mechanisms.

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It may not be well known, but iOS has several ways to save things as PDF and print webpages and other documents as PDF files. While one of the most popular methods involves using 3D Touch, another PDF generation approach is available to devices without that capability, and instead relies on a gesture trick to save something as PDF. The advantage to saving PDF files with the gesture method is that it works on iPad as well as iPhone and iPod touch, covering a much broader range of devices.

It’s quite simple too, though it is completely hidden from any obvious user interaction. We’re going to demonstrate this great PDF saving trick by saving a webpage as a PDF on iPhone, iPad, and iPod touch, but it works the same with other document types from common apps like Notes, Pages, Numbers, and many others. You’ll need a modern version of iOS 10 or newer to have this special save PDF gesture feature, it is not included in old releases, so update your device if need be.

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Every once in a while an email might fail to send, not get through to a recipient, or is just plain lost in the midst of a busy inbox. Or maybe that email was so fantastic you just want to send it again for fun? In these situations, you’d want to resend an email message, which is easily achievable in the Mail app for Mac OS and Mac OS X.

This walkthrough will demonstrate resending an email in the Mac Mail app. You can resend any sent message for any reason you want, whether it was delivered or failed does not matter.

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You can easily speed up YouTube videos or slow down video playback, all by adjusting some simple but largely hidden and little known settings on the YouTube web site. This is a helpful trick for many reasons, for example if you’re watching something boring that you want to accelerate, if you want to speed up a conversation or interview you’re watching, or maybe you want to slow down a video to enjoy it at a more casual pace or to understand it better.

You can also use this trick to speed up and slow down songs played on YouTube. All you need is a web browser, and it works the same on any computer.

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Do you have GPS coordinates for a location that you’d like to enter on the iPhone? You can input and search maps by GPS coordinates on the iPhone easily by using the Apple Maps or Google Maps applications, as we’ll demonstrate in this walkthrough.

You will be able to input, search for, find, locate, and show on a map any location as defined by GPS coordinates, which are traditionally in a latitude and longitude, DMS, or the DD decimal degrees format, though you can also use other geolocation formats too. While we’re focusing on finding locations by GPS coordinates with iPhone, this trick works the same to enter geolocation data on the same mapping apps on iPad and iPod touch as well.

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It is assumed that Apple will stop allowing older 32-bit applications to run on future iOS system software releases. Essentially this means that it’s possible some older apps will stop working on an iPhone or iPad after the device has updated to some system software release, unless the developer updates those apps to include modernized 64-bit support.

While this is all fairly technical and far beyond what the average iPhone or iPad user should worry about, it could potentially impact some users who rely on older apps, or apps which are no longer updated by developers. Thus, if you are curious if any of this may impact you or the apps you rely on for iOS, you can now check which apps are compatible and which may not be in the future.

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Advanced Mac users may find it useful to run macOS or Mac OS X in a virtual machine atop their existing Mac operating system. Creating a virtual machine for Mac OS is now easier than ever before, and we’ll show you how to set up easy Mac virtual machines on a Mac.

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Many of us have multiple email accounts, whether they are for personal uses or work purposes, and thus Mac users may find it helpful to add a new email account to the Mail app in Mac OS.

This guide will walk through the process of adding an email account to the Mac so that it can be checked, managed, and used from the Mail app. You can use this to add another email account to Mail on Mac, setup a new email account, or even add a fresh email account that has never been used before. Technically you can add many email accounts to the Mail app if you want to, there is no small limitation on the number of accounts that can be configured within the app. Configuration is the same on virtually every vaguely new release of Mac system software, whether it’s macOS or Mac OS X.

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Apple has released the second beta versions of iOS 10.3.2, macOS 10.12.5, tvOS 10.2.1, and WatchOS 3.2.2.

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Have you ever wanted to see all the Instagram pictures you have liked before? Or maybe you wanted to see a picture again that you know you liked recently? No problem, the Instagram app offers a simple way to see all of the images you have liked on the service.

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Mac users may encounter a pop-up error originating from the Messages app in Mac OS which informs them “your message could not be sent”. Often when this error dialog appears, it’s seemingly out of nowhere or when a Mac wakes from sleep or has rebooted.

While it’s possible to encounter the “your message could not be sent” error for legitimate sending failures, or because iCloud or iMessage is down (very rare), it’s also possible the error can appear due to a syncing issue in which case there is nothing to adjust, and the solution in that case is a bit goofy.

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Have you ever had a phone call come in which you couldn’t answer right away, but it’s important enough that you don’t want to forget to call back? The iPhone has a great solution to this common scenario, with the iPhone phone apps “Remind Me” feature.

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The Mac has a myriad of features available to make our computing lives easier and we cover them regularly, but here we will highlight five particularly simple yet incredibly useful tricks that Mac users can access and use. Some of these tips may be well known by power users, and others less known by everyone else.

From instant information lookups, quickly reviewing every open window in Mac OS, speedy Emoji access, focusing attention by ignoring notifications, and using Spotlight as a quick launch tool, read on to learn some great tricks.

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