It’s a free, open-source app that can test a keyboard and also test your screen for dead pixels. Download and run the app. Select the ‘Keyboard Test’ on the app’s launch screen and you will get an on-screen keyboard. Go ahead and tap different keys to see if they’re working or not, and which key is recognized in response to a keypress. To maintain my sanity, I have done my best to keep as many Macs as possible on the same version of the Mac OS. With few exceptions, that means System 7.5.5. (Or 7.5.3 for a few Macs that are not compatible with 7.5.5.) I find it complete and stable. At this point, I see no reason to ever change most users to Mac OS 8 or newer. MacOS Big Sur elevates the most advanced desktop operating system in the world to a new level of power and beauty. Experience Mac to the fullest with a refined new design. Enjoy the biggest Safari update ever. Discover new features for Maps and Messages. Get even more transparency around your privacy.

• Keep Your Sanity Mac Os Catalina
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Smart Folder is a built-in feature on Mac, and probably one of the most undervalued features in the operating system. It can come in handy to help you better organize your files to make the. Keeping your Mac software and programs updated is possibly the simplest and most straightforward way of keeping your Mac safe from hackers. Cybercriminals target outdated software because they know where to find security vulnerabilities that developers only patch in updated versions.

Make sure that your devices meet the requirements for using AirPlay. To use Siri to play and control video from your iPhone, iPad, or iPod touch, add your Apple TV or AirPlay 2-compatible smart TV to the Home app and assign it to a room.

Stream video from your iPhone, iPad, or iPod touch

1. Connect your device to the same Wi-Fi network as your Apple TV or AirPlay 2-compatible smart TV.
2. Find the video that you want to stream.
3. Tap . In some third-party apps, you might need to tap a different icon first.* In the Photos app, tap , then tap .
   
4. Choose your Apple TV or AirPlay 2-compatible smart TV. Need help?

To stop streaming, tap in the app that you're streaming from, then tap your iPhone, iPad, or iPod touch from the list.

*Some video apps might not support AirPlay. If you can’t use AirPlay with a video app, check the App Store for tvOS to see if that app is available on Apple TV.

If video automatically streams to an AirPlay device

Your device might automatically stream video to the Apple TV or AirPlay 2-compatible smart TV that you frequently use. If you open a video app and see in the upper-left corner, then an AirPlay device is already selected.

To use AirPlay with a different device, tap, then tap another device, or tap 'iPhone' to stop streaming with AirPlay.

Stream video from your Mac

1. Connect your Mac to the same Wi-Fi network as your Apple TV or AirPlay 2-compatible smart TV.
2. On your Mac, open the app or website that you want to stream video from.
3. In the video playback controls, click .
4. Select your Apple TV or smart TV. Need help?

To stop streaming video, click in the video playback controls, then choose Turn Off AirPlay.

Mirror your iPhone, iPad, or iPod touch

Use Screen Mirroring to see the entire screen of your iPhone, iPad, or iPod touch on your Apple TV or AirPlay 2-compatible smart TV.

1. Connect your iPhone, iPad, or iPod touch to the same Wi-Fi network as your Apple TV or AirPlay 2-compatible smart TV.
2. Open Control Center:
   • On iPhone X or later or iPad with iPadOS 13 or later: Swipe down from the upper-right corner of the screen.
   • On iPhone 8 or earlier or iOS 11 or earlier: Swipe up from the bottom edge of the screen.
3. Tap Screen Mirroring.
4. Select your Apple TV or AirPlay 2-compatible smart TV from the list. Need help?
5. If an AirPlay passcode appears on your TV screen, enter the passcode on your iOS or iPadOS device.

Your TV uses your iOS or iPadOS device's screen orientation and aspect ratio. To fill your TV screen with the mirrored device screen, change your TV's aspect ratio or zoom settings.

To stop mirroring your iOS or iPadOS device, open Control Center, tap Screen Mirroring, then tap Stop Mirroring. Or press the Menu button on your Apple TV Remote.

Mirror or extend your Mac display

With Apple TV or an AirPlay 2-compatible smart TV, you can mirror the entire display of your Mac to your TV or use your TV as a separate display.

1. Connect your Mac to the same Wi-Fi network as your Apple TV or AirPlay 2-compatible smart TV.
2. On your Mac, click in the menu bar at the top of your screen. If you don't see , go to Apple  menu > System Preferences > Displays, then select 'Show mirroring options in the menu bar when available.'
3. Choose your Apple TV or AirPlay 2-compatible smart TV. Need help?
4. If an AirPlay passcode appears on your TV screen, enter the passcode on your Mac.

Change settings or stop mirroring

Keep Your Sanity Mac Os Catalina

To change the size of your desktop mirrored on your TV, click in the menu bar. Then select Mirror Built-in Display to match the size of your desktop or Mirror Apple TV to match the size of your TV.

AirPlay also lets you use your TV as a separate display for your Mac. Just click in the menu bar, then select Use As Separate Display.

To stop mirroring or using your TV as a separate display, click in the menu bar, then choose Turn AirPlay Off. Or press the Menu button on your Apple TV Remote.

Learn more about mirroring or extending the display of your Mac.

Do more with AirPlay

• Use Siri on your iPhone, iPad, or iPod touch to play movies and TV shows, and control playback on your Apple TV or AirPlay 2-compatible smart TV.
• Use AirPlay to stream music, podcasts, and more to your Apple TV, HomePod, or other AirPlay-compatible speakers.
• Add your AirPlay 2-compatible speakers and smart TVs to the Home app.
• Learn what to do if you can't stream content or mirror your device's screen with AirPlay.

Back in the “classic” Mac OS, one of the ways users could personalize their Macs was to use a custom startup screen. By saving their favorite image as a particular type of graphics file, naming it “StartupScreen,” and placing it in the System Folder, that image would be used as the background image during startup.

Mac OS X also provides a few ways for you to personalize your Mac (the boot panel, the login screen, and more), each requiring a different procedure. Unfortunately, although some of these procedures are simple, others require bits of file finagling that few users are likely to undertake. Thankfully, there’s an alternative: Sanity Software’s $10 Visage 2.0 ( ).

(Side note: Visage has actually been around since Mac OS X 10.1, and a release for OS X 10.2 [Jaguar], version 1.2.4, was one of my favorite “customization” tools at the time. Unfortunately, changes in 10.3 [Panther] prevented some of 1.2.4’s features from working properly, and Sanity never released a fully compatible version. So Sanity surprised many Mac OS X tweakers with its recent release of Visage 2.0 for Tiger.)

Visage acts as a System Preferences pane and provides four sets of customizations, each via a tab in the preferences pane:

• Login Background By choosing an image from the Current Login Screen Background pop-up menu, you can change the background image you see at login. To add images to the menu, you click the Import button and choose individual images or folders of images—any JPEG (.jpg) image will work. (You can create your own images or find images at Web sites such as MacDesktops; you can use Preview to convert images from other formats to JPEG). This is actually the easiest “hack” to perform manually, as simply naming any JPEG image “AquaBlue.jpg” and placing it in /Library/Desktop Pictures will accomplish the same thing. However, Visage makes it easier to make the switch—keeping a backup of the original—and can keep track of a library of images. It can also randomly pick from among your library of login backgrounds each time you log out.
• Login Panel This set of options lets you customize the login panel —the white box with the Apple logo where you actually log in to Mac OS X. Using the same kind of pop-up menus and Import buttons as those found on Visage’s the Login Background screen, you can choose to replace the Apple logo with any JPEG, GIF, TIFF, PNG, or PICT image with dimensions of 90-by-90 pixels; and the login panel title (the “Mac OS X” logo) with a similar-format image with dimensions of 140 pixels wide by 24 pixels high. You can also add a text message below the two logos (just below the name of your computer) via the Login Panel Text Message box. For example, I’ve added my name, email address, and phone number—just in case I ever lose my PowerBook and it’s found by an honest soul.
• Boot Panel In previous versions of Mac OS X, Visage allowed you to change the actual boot panel image—the image you see just after your Mac begins booting, but before the login panel. (The boot panel is the one that says “Starting Mac OS X…” in Tiger, or, in Panther and earlier, lists services as they start up.) Unfortunately, Tiger has changed the way this screen is stored, so Visage can now change only the boot panel message. In other words, under Tiger, you can change “Starting Mac OS X…” to the text of your choice. Although given how quickly Tiger boots, you won’t see this text for very long.
• Personal Alerts If you’d like to truly personalize your Mac OS X experience, you can use the Personal Alerts screen to do just that. By typing your name in the Personalized Prefix field, many standard alert boxes in OS X will prefix those alert messages with your name. For example, when I choose Shut Down from the Apple Menu, I see the following message:

Visage also provides one other feature via the Desktop Effects tab: the ability to view any OS X screen saver as your Desktop background. Such a tweak is interesting to watch, especially the first time you see it, but it sucks up a good amount of processing power, so I don’t use it.

Most of the customizations provided by Visage require an administrative username and password, since Visage changes system-level file and/or settings to do its thing. Also, you need to log out and then log back in for most changes to take effect. (For the boot panel message, you obviously need to restart to view the changes.) Once you make these changes, they remain until you use Visage to reset them, even if you uninstall Visage—so if you decide Visage isn’t for you, be sure to revert everything back to the Apple defaults before you get rid of Visage.

Unlike most Mac Gems, Visage doesn’t increase productivity or make your Mac-using life easier. However, it brings back some of the old Mac-customizing fun, which, judging by the many such requests I’ve seen on the Macworld forums, should make it a Mac Gem for many users.

Keep Your Sanity Mac Os 11

Visage 2.0 is compatible with Tiger. Older versions are also available for OS X 10.2 and 10.1. Visage 1.2.4 is partially compatible with OS 10.3 Panther—the Desktop Effects, Login Background, and Login Text Message options work, but other functions don’t.