The Displays pane

If you’re a heavy-duty gamer, or if you work with applications such as Keynote and Adobe Photoshop, you probably switch your monitor’s characteristics regularly. To switch easily, visit the Displays pane, shown in Figure 5-4.

This pane includes three sections:

• Display: To allow Catalina to choose the best resolution for your display, select the Default for Display radio button. To select a resolution manually, select the Scaled radio button and then select the resolution you want to use in the Resolutions list that appears. In most cases, you want to use the highest resolution.

  Move the Brightness slider to adjust the brightness level of your MacBook’s display. If you like, you can enable the Automatically Adjust Brightness check box to allow your MacBook to select a brightness level.

  Ready to stream content to your TV directly from your MacBook — without cables? You can use Catalina’s wireless AirPlay Display feature to send the display from your MacBook to your HDTV. AirPlay requires an Apple TV unit that supports this feature. You can also send the audio from your MacBook directly to an AirPlay-enabled receiver or speaker system. To make it easier to control AirPlay, select the check box titled Show Mirroring Options in the Menu Bar When Available. (Note that the icon will appear on your menu bar only when an Apple TV unit is within range.)

• Color: Click a display color profile to control the colors on your screen. To load a profile, click the Open Profile button. To create a custom ColorSync profile and calibrate the colors that you see, click the Calibrate button to launch the Display Calibrator. This easy-to-use assistant walks you step by step through creating a ColorSync profile matched to your MacBook’s gamma and white-point values.

• Night Shift: If your MacBook was built in 2012 or later, the Night Shift feature allows Catalina to automatically adjust your display to provide warmer colors during nighttime operation. Click Schedule to choose either Sunset to Sunrise operation, or create your own custom schedule. You can also turn on Night Shift manually by selecting the Turn On Until Tomorrow check box. Finally, adjust the Color Temperature slider to increase or decrease the warmth of colors on your display.

  If you connect your MacBook to an external monitor, don’t be surprised to see the Arrangement section appear as well. You can drag the output to a different monitor, drag the menu bar to another screen, or mirror the same output to all displays connected to your MacBook.

The Desktop & Screen Saver pane

No offense to the awesome Catalina Island default background, but who doesn’t want to choose his or her own background? And what about one of those nifty Apple screen savers? You can change both the background and screen saver by using these options in the Desktop & Screen Saver pane.

The settings on the Desktop panel, shown in Figure 5-5, are

• Current Desktop picture: You can click a picture in the thumbnail list in the right half of the pane to use it as your Desktop background. The Desktop is updated immediately, and the thumbnail appears in the well (the top-left box in Figure 5-5). To display a different image collection or open a folder of your own images, click the Add Folder button in the bottom-left corner of the window (a plus sign) and browse to your heart’s desire; then click Choose to select a folder and display the images it contains.
• Layout: You can tile your background image, center it, fill the screen with it (cropping the edges if necessary), and stretch it to fill the screen (without cropping). Note that filling the screen in either case may distort the image. The layout pop-up menu appears only when you’re using your own pictures, so you don’t see it if you’re using a Desktop image supplied by Apple.
• Change Picture: When you select this check box, the Desktop background changes automatically after the delay period you set, including each time you log in and each time your Mac wakes up from sleep mode.
• Random Order: To display screens randomly, enable the Random Order check box. Otherwise, the backgrounds are displayed in the sequence in which they appear in the thumbnail list.

The settings on the Screen Saver tab are

• Screen Saver: In the Screen Saver list on the left side of the pane, click any screen saver to preview (on the right side). To try out the screen saver in full-screen mode, hover your pointer over the display on the right and click the Preview button that appears. (You can end the test by moving the cursor.) If the screen-saver module you select has any configurable settings, they appear in the right display. Click the Use Random Screen Saver check box to display a different screen-saver module each time the screen saver is activated.
• Start After: Specify the period of inactivity that triggers the screen saver. To disable the screen saver, select the Never setting at the top of the list. (Your Start After delay should be a shorter time than the Turn Display Off After delay you set in the System Preferences Energy Saver pane. Otherwise, you won’t see the great screen saver at all. I describe the Energy Saver pane later in this chapter.)
• Show with Clock: If you want your selected screen saver to display the time as well, select this check box.

• Hot Corners: Click the Hot Corners button and then click any of the four pop-up menus in the four corners of the screen. Doing so designates that corner as an activation hot corner for several functions within Catalina. When you move your cursor to that hot corner, the function you specified is triggered automatically.

  For additional security, check out the Security & Privacy pane in System Preferences, where you find the Require Password After Sleep or Screen Saver Begins check box. When you select this check box and choose a delay period from the drop-down menu, Catalina requires your user account password before allowing anyone to turn off the screen saver (a great idea for use when you’re traveling, as you can imagine).

Mission Control preferences

Figure 5-6 shows the Mission Control and Spaces settings you can configure in this group. You can use Mission Control to view all the application windows you’re using at one time so that you can select a new active window, or you can move all windows aside so that you can see the Desktop.

The settings are

• Automatically Rearrange Spaces Based on Most Recent Use: If this check box is selected, Mission Control presents your most recently used Spaces first in the thumbnails at the top of the screen.
• When Switching to an Application … : When selected, this check box allows you to switch applications between Spaces desktops by using the ⌘ +Tab shortcut. Catalina jumps to the Desktop that has an open window for the application you choose, even if that Desktop isn’t currently active.
• Group Windows by Application: When selected, this check box automatically arranges windows in the Mission Control screen by the applications that created them.
• Displays Have Separate Spaces: If you have multiple monitors connected to your Mac, you can select this check box to create a separate Spaces display for each monitor.

• Keyboard and Mouse Shortcuts: From each pop-up menu, set the key sequences (and mouse settings) for Mission Control, Application Windows, Show Desktop, and Show Dashboard.

  You’re not limited to keyboard and mouse shortcuts in the pop-up menus. Press the Shift, Control, Option, and ⌘  keys while a pop-up menu is open, and these modifiers appear as menu choices! (Heck, you can even combine modifiers, such as ⌘ +Shift+F9 instead of just F9.)

• Hot Corners: Click the button in the bottom-left corner of the pane to specify your hot-corner settings. These four pop-up menus mirror those of the Desktop & Screen Savers pane, allowing you to control the operation of the screen management features within Catalina. Click one menu to designate that corner as one of the following:

  • A Mission Control corner displays the Mission Control screen.
  • An Application Windows corner displays only the windows from the active application.
  • A Desktop corner moves all windows to the outside of the screen to uncover your Desktop.
  • A Launchpad corner activates the Launchpad screen.
  • A Notification Center corner displays the Notification Center strip on the right side of your Desktop.

  Note that you can also set the Screen Saver Start and Disable corners from the Hot Corners pop-up menus, as well as put your display to sleep or lock it.

The General pane

The talented General pane, shown in Figure 5-7, determines the look and operation of the controls that appear in application windows and Finder windows. It looks complex, but I cover each option in this selection.

The settings are

• Appearance: Choose a color to use for buttons, menus, and windows. Choose Light mode for the familiar bright scheme or switch to Dark mode for your Finder menu bar and Dock (which is perfect for low-light environments). Choose Auto and watch in amazement as macOS switches between Light and Dark modes based on the time of day!
• Accent Color: Choose a color for radio button, check box, and drop-down menu controls.
• Highlight Color: Choose a color to highlight selected text in fields and pop-up menus.
• Sidebar Icon Size: Choose the size of the icons in the Finder window’s Sidebar — the strip on the left side of the Finder window that displays devices and favorite locations on your system. If you have a large number of hard drives, or if you’ve added several folders to the Sidebar, reducing the size of the icons allows you to display more of them without scrolling.
• Show Scroll Bars: Specify when Catalina should display scroll bars in a window. By default, they’re placed automatically when necessary, but you can choose to display scroll bars always or only when you’re scrolling through a document.
• Click in the Scroll Bar To: By default, macOS jumps to the next or previous page when you click an empty portion of the scroll bar. Select the Jump to the Spot That’s Clicked radio button to scroll the document to the approximate position in relation to where you click.
• Default Web Browser: Click this pop-up menu to specify which application Yosemite should use to display web pages. By default, macOS uses the Safari web browser.
• Ask to Keep Changes When Closing Documents: If you select this check box, Catalina prompts you for confirmation if you attempt to close a document with unsaved changes. If the check box is deselected, Catalina allows you to close an unsaved document without saving a new version.
• Close Windows When Quitting an App: If this check box is deselected, the macOS Resume feature automatically saves the state of an application when you quit. When you launch the application again, Catalina restores all application windows and opens the documents you were working on when you quit. In effect, you can continue using the application just as though you’d never quit. If you select the check box, Catalina doesn’t restore your work, and you have to reload your document.
• Recent Items: The default number of recent applications, documents, and servers (available from the Recent Items item on the Apple menu ) is 10. To change the default, open the pop-up menu here and choose up to 50. (I like 20 or 30.)
• Allow Handoff Between This Mac and Your iCloud Devices: If this check box appears in the General pane, you can enable it to turn on Handoff functionality within Catalina. (I discuss Handoff within the confines of Chapter 9.) Note that this check box doesn’t appear on older MacBooks without compatible Bluetooth hardware.
• Use Font Smoothing When Available: By default, this check box is enabled, making the text on your MacBook’s display appear more like it would on a printed page. You can turn off this feature to speed text display slightly.

The Energy Saver pane

I’m an environmentalist — it’s not surprising how many techno types are colored green — so the two sections of the Energy Saver pane (shown in Figure 5-8) are pretty doggone important. When you use them correctly, you not only conserve battery power, but also invoke the Power of Catalina to automatically start up and shut down your laptop whenever you like!

To choose a delay period for blanking your screen, drag the Turn Display Off After slider to the desired period (or choose Never to disable display sleep). You can also power down the drive to conserve energy and prevent wear and tear with the Put Hard Disks to Sleep check box — an especially good feature for laptops that have magnetic hard drives.

Enable the check box titled Slightly Dim the Display While on Battery Power to save additional power by reducing the brightness of your MacBook’s screen. (I can hardly notice the difference, but your laptop’s battery will thank you!)

Click the check box titled Enable Power Nap While on Battery Power to allow Catalina to download updates, update iCloud data, and check for new mail and messages while your MacBook is closed. (Note that the Power Nap feature causes your laptop to use significantly more energy in sleep mode, and it’s possible for the battery to drain completely.)

If you want to start up or shut down your laptop at a scheduled time, click the Schedule button. Select the desired schedules (the Start Up or Wake check box and the Shut Down/Sleep check box) to enable them. Then click the up and down arrows next to the time display to set the trigger time. Click OK to return to the Energy Saver pane.

Mac laptop owners can set two separate Energy Saver configurations by clicking one of the two tabs at the top of the pane:

• Battery: Applies when the MacBook is running on battery power
• Power Adapter: Kicks in when the laptop is connected to an AC outlet

Your MacBook automatically switches to the proper configuration when you plug in or unplug your laptop.

Some of the settings can toggle events that control sleep mode in Catalina, including a Wi-Fi network connection (the Wake for Wi-Fi Network Access check box, which appears in the Power Adapter section).

Naturally, MacBook owners will want to click the Show Battery Status in Menu Bar check box to select it.

The Dock pane

I’ll come clean: I think the Dock is the best thing since sliced bread. (I wonder what people referred to before sliced bread was invented?) You can use the settings shown in Figure 5-9 to configure the Dock’s behavior until it fits your personality like a glove.

These settings are

• Size: This control is pretty self-explanatory. Just drag the slider to change the Dock’s scale.
• Magnification: When you select this check box, each icon in the Dock swells like a puffer fish when you move the cursor over it. (The Magnification slider determines just how much it magnifies.) I really like this feature because I resize my Dock smaller and have a large number of Dock icons.
• Position on Screen: Select a radio button to position the Dock on the left, bottom, or right edge of the Desktop.
• Minimize Windows Using: Catalina includes two cool animations that you can choose to shrink a window to the Dock and expand it back to the Desktop. Click the Minimize Windows Using pop-up menu to specify the Genie (genie-in-a-bottle) or Scale (scale-up-or-down-incrementally) effect.
• Prefer Tabs when Opening Documents: This setting allows you to specify when your applications should open documents in a new tab display or within a new document window. You can choose to use tabs always, only in full-screen mode, or only when you create a new tab in the application itself. (Note that if an application doesn’t support tab display, new documents open in a window.)
• Double-Click a Window’s Title Bar to Minimize/Zoom: Select this check box to minimize or zoom a Finder or application window by double-clicking the window’s title bar.
• Minimize Windows into Application Icon: If this check box isn’t enabled, minimized application windows appear as thumbnail icons on the Dock. To minimize application windows into the application icon on the Dock — which can save space on your Dock — select this check box. (To restore a window that’s been minimized into the application icon, right-click the icon on the Dock and choose Restore from the shortcut menu that appears.)
• Animate Opening Applications: Active souls who like animation probably get a kick out of the bouncing application icons in the Dock, which indicate that you’ve launched an application and that it’s loading. If you find this effervescence to be overly buoyant or distracting, deselect this check box.
• Automatically Hide and Show the Dock: Select this check box, and the Dock disappears until you need it. (Depending on the size of your Dock, the Desktop real estate you gain can be significant.) To display a hidden Dock, move the cursor over the corresponding edge of the Desktop.
• Show Indicators for Open Applications: macOS indicates which applications are running in the Dock by displaying a small gray dot in front of the icon. To disable these indicators, deselect this check box.
• Show Recent Applications in Dock: I love this feature! Select this check box to display the icons for applications you’ve been using recently in a separate section of the Dock. (The Recent Applications section is demurely positioned between your static Dock icons and the Downloads folder, toward the right end of the Dock.) Naturally, there’s not enough space to rival the lengthy Recent Items list on the Apple menu, but the convenience of launching that one application you use all the time is still pretty nifty.

The Sharing pane

So you’re in a neighborly mood, and you want to share your toys with others on your local wired or wireless network. Perhaps you’d like to start your own website or protect yourself from the Bad Guys on the Internet. All these fun diversions are available from the Sharing pane in System Preferences, shown in Figure 5-10.

Click the Edit button to change the default network name assigned to your MacBook during the installation process. Your current network name is listed in the Computer Name text field.

Each entry in the services list controls a specific type of sharing, including Screen Sharing, File Sharing (with other Macs and PCs running Windows), Media Sharing, Printer Sharing, Remote Login, Remote Management (using Apple Remote Desktop), Remote Apple Events, Bluetooth Sharing, Internet Sharing, and Content Caching (which stores updates and other content for later installation). To turn on any of these services, select the On check box for that service. To turn off a service, click its On check box to deselect it.

From a security standpoint, I highly recommend that you enable only the services you actually use. Each service you enable automatically opens your Catalina firewall for that service. Here’s a Mark’s Maxim to remember:

Poking too many holes in your firewall is not A Good Thing.™

When you click one of the services in the list, the right side of the Sharing pane changes to display the settings you can specify for that particular service.

The Time Machine pane

MacBook users are thrilled with the Time Machine automatic backup feature that’s built into Catalina. It’s saved my stuff numerous times. You can easily configure how Time Machine handles your backups from this pane, shown in Figure 5-11. Chapter 21 covers how to use Time Machine. You need an external drive (or an AirPort Time Capsule wireless backup device) for the best backup security, of course. Note that Time Machine doesn’t work with a CD or DVD rewritable drive; you must use an external drive or a high-capacity USB flash drive.

To enable Time Machine, click the Back Up Automatically check box and then select a disk to hold your Time Machine backup data on the sheet that appears. Click Use Disk on the sheet to confirm your choice. (Your external backup drive should be at least twice the capacity of your internal drive, ensuring that your backup files have the elbow room they need.) If you have an external Time Capsule wireless unit, click Set Up (instead of Use Disk) on the sheet.

By default, Time Machine backs up all the drives on your system, but you may not need to back up some folders on your MacBook. To save time and backup-drive space, Time Machine allows you to exclude specific folders from the backup process. Click Options and then click the Add button (with the plus sign) to select the drives or folders you want to exclude. They appear in the Exclude These Items From Backups list.

To remove an exclusion, select it in the list and click the Delete button (with the minus sign). Note that the Estimated Size of Full Backup figure increases, and Time Machine adds the item you deleted from the list to the next backup.

If you enable the Show Time Machine in Menu Bar check box, you can elect to back up your Mac immediately by clicking the Time Machine icon on the Finder menu bar and then choosing Back Up Now from the drop-down menu.

By default, Catalina warns you before deleting older backup files, but you can turn this warning off from the Options sheet. To reduce the overall size of each backup, you can also elect to exclude system files and applications (which would be recovered automatically if you reinstalled Catalina in the future).

Apple ID preferences

From the iCloud section of the Catalina Apple ID Preferences pane, shown in Figure 5-12, you can specify which types of data are automatically pushed to your MacBook and iOS devices. If you haven’t created an iCloud account yet — or if you signed out of an existing account earlier — System Preferences prompts you to enter your Apple ID and password. Click Sign In to display the contents of the iCloud pane.

The check boxes for each category are

• iCloud Drive: Enable and disable iCloud Drive access for specific applications.
• Photos: Push the latest photos and video clips you’ve added in Photos to other devices, and update your Photos library with photos and video clips pushed from your iOS devices.
• Mail: Synchronize your Mail account settings between devices.
• Contacts: Push your Contact cards between devices.
• Calendars: Push your calendar events to and from your iOS devices.
• Reminders: Synchronize the reminders you’ve set between devices.
• Safari: Synchronize your Safari bookmarks.
• Notes: Synchronize your Notes between devices.
• Siri: Synchronize your Siri configuration.
• Keychain: Share passwords for applications and websites between your devices.

• Find My Mac: Locate your MacBook from a web browser or your iOS device. You can also choose to lock your computer remotely — or even wipe your laptop’s hard drive to prevent someone from stealing your data.

  Wiping your MacBook remotely is a drastic step that will prevent you from locating it in the future.

• News: Synchronize the articles you’ve read, articles you’ve saved, and sources you’re following in the News application.
• Stocks: Synchronize stocks that you’re following between devices.
• Home: Share video from a HomeKit-enabled camera between devices, using Catalina’s new Home application.

To display the storage currently being used by your mail, backups, documents, and application data, click the Manage button in the bottom-right corner of the pane. Apple provides each iCloud account 5GB of space for free, but you can elect to buy additional storage from the Manage sheet.

Notifications preferences

The Notifications pane is shown in Figure 5-13. Each application that can display notifications appears in the list on the left side of the pane.

Click the Do Not Disturb entry in the list on the left side to set Do Not Disturb mode, in which Notification banners, alerts, and sounds are disabled. You can specify a time period, turn on Do Not Disturb when your MacBook is in sleep mode, or turn on Do Not Disturb when you’re mirroring (or sending) the video from your MacBook to a TV or projector. You can also allow FaceTime calls from anyone while Do Not Disturb is active or only from those you’ve marked as Favorites in FaceTime. If you select Allow Repeated Calls, a FaceTime caller can call a second time within three minutes without being disabled.

Click an application in the list on the left side of the pane to configure its notifications. Different applications display different options, but the settings can include the following:

• Alert Style: These three buttons specify which type of alert should appear below the Notification Center icon on the menu bar. You don’t need to display Notification Center to see alerts, which appear on your Desktop. Choose None to disable alerts for this application. Choose Banners to display alert messages that automatically disappear after a delay. Choose Alerts to display alert messages that remain onscreen until you click the confirmation button on the Alert dialog.
• Show Notifications on Lock Screen: If it appears, you can select this check box to allow notifications even if your MacBook is displaying the Lock screen.
• Show Notification Preview: Select this check box to display preview information for news articles, Mail content, and Messages. You can choose to display preview notifications always or only when your MacBook is unlocked.
• Show in Notification Center: To display notification messages from this application in the Notification Center, select this check box. You can also specify how many recent messages from this application are displayed.
• Badge App Icon: This check box toggles the display of this application’s icon in alert boxes and in the Notification Center. It also activates the numeric display of pending items on the icon itself (such as unread mail and messages).
• Play Sound for Notifications: To play a sound when alerts appear, enable this check box.

You can change the order in which notifications are sorted in the Notification Center by making a choice from the Notification Sort Order drop-down menu at the bottom of the pane. The default sort is by the most recent, but you can choose Recents by App to sort recent notifications grouped by applications. For the ultimate in custom notifications, choose Manually by App from the drop-down menu and drag the applications in the list on the left side of the pane into the desired order.