Certain actions that you perform on your Mac will cause default apps to open. For example, clicking a document may open Pages. But what if you want Microsoft Word to open instead? You can also set your default web browser and email reader.
Here's how!
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You may have seen a file in some of your folders called.DSStore.The dot means this is a hidden file so it won't usually show up in Finder.DSStore stands for Desktop Services Store and is used to store folder specific settings. If many of your folders have different view options, it's because their unique.DSStore files have different settings.
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How to change the default Mac app for specific file types
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Right-click on a file that uses the file type you'd like to change the default for. For example, one with a .jpg extension (a photo).
Click on Get Info in the pop-up.
Click Open With if the section isn't already expanded.
Click the dropdown and choose an app.
Source: iMore
Click Change All...
Click Continue when the Finder asks you if you're sure.
Source: iMore
Now any time you open a file with that extension, the Finder will automatically open it with the app you've selected.
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How to set your default web browser
Launch System Preferences from the dock, Finder, or by clicking the Apple icon in the Menu bar.
Click General at the top left of the window.
Click the dropdown next to Default web browser.
Click the web browser you'd like to use as the default.
Source: iMore
How to set your default email reader
Mail is likely the default email app on your Mac, but just in case you have others downloaded, you can set the default reader. Here's how:
Launch Mail from your dock or the Finder.
Click Mail in the menu bar at the top of the screen.
Click Preferences.
Click the dropdown next to Default Mail Reader.
Click the app you'd like to set as the default.
Source: iMore
Questions?
Let us know in the comments below.
Updated February 2020: Updated for macOS Catalina!
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You can make all of your displays mirror each other, or extend your workspace with different apps and windows on each display. If you use an external display with your Mac notebook, you can also use closed-display mode.
Check your requirements
Check the ports on your Mac to find out whether you need an adapter.
Check how many displays your Mac supports: Choose Apple menu > About This Mac, click Support, then click Specifications. On the webpage that appears, the number of displays your Mac supports appears under Video Support.
Use extended desktop mode
Maximize your workspace with extended desktop mode, which lets you enjoy full-screen apps and windows on each monitor. Then, use Mission Control to organize apps and windows across your displays. If your Dock is on the bottom of your screen, it appears on any of your displays when you move your pointer to the bottom edge of your display.
Turn on extended desktop mode
Make sure that your external display is turned on and connected to your Mac.
Choose Apple menu > System Preferences, then click Displays.
Click the Arrangement tab.
Make sure that the Mirror Displays checkbox isn’t selected.
Arrange your displays or change your primary display
So that you can move apps and windows across your displays in one continuous motion, arrange your displays to match the setup on your desk. You can also change your primary display, which is where your desktop icons and app windows first appear.
Choose Apple menu > System Preferences, then click Displays.
Click the Arrangement tab.
To change the position of a display, drag it to the desired position. A red border appears around the display as it's moved.
To set a different display as the primary display, drag the menu bar to the other display.
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Use video mirroring
With video mirroring, all of your displays show the same apps and windows.
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Turn on video mirroring
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Make sure that your external display is turned on and connected to your Mac.
Choose Apple menu > System Preferences, click Displays, then click the Arrangement tab.
Make sure that the Mirror Displays checkbox is selected.
Use AirPlay
With Apple TV, you can mirror the entire display of your Mac to your TV, or use your TV as a separate display. To turn on AirPlay, follow these steps:
Make sure that your TV is turned on.
Choose in the menu bar, then choose your Apple TV. If an AirPlay passcode appears on your TV screen, enter the passcode on your Mac.
Mirror your display or use your TV as a separate display:
To mirror your display, choose , then choose Mirror Built-in Display.
To use your TV as a separate display, choose , then choose Use As Separate Display.
To turn off AirPlay, choose , then choose Turn AirPlay Off.
If you don't see in the menu bar, choose Apple menu > System Preferences, click Displays, then select the 'Show mirroring options in the menu bar when available' checkbox.
Learn more about how to AirPlay video from your Mac.