設(shè)置Mac的默認打印機需要進入系統(tǒng)設(shè)置，通過右鍵點擊目標打印機選擇“設(shè)為默認打印機”。 1. 打開蘋果菜單中的系統(tǒng)設(shè)置（或系統(tǒng)偏好設(shè)置），進入“打印機與掃描儀”；2. 確保所需打印機已添加並顯示為“在線”；3. 右鍵點擊該打印機並選擇“設(shè)為默認打印機”；4. 默認設(shè)置後，所有打印任務(wù)將自動發(fā)送到該打印機，除非手動選擇其他設(shè)備；5. 如需更改或取消默認設(shè)置，可再次右鍵對應(yīng)打印機進行操作。

Setting a default printer on Mac is straightforward once you know where to look. The key is understanding that macOS handles this through System Settings, and the option isn't always where people expect.

Find It in System Settings

The default printer setting lives under Printers & Scanners in System Settings (or System Preferences on older macOS versions). Open it from the Apple menu > System Settings (or System Preferences), then click "Printers & Scanners" on the left sidebar.

You'll see a list of printers already added. If the one you want isn't there, click the plus ( ) button at the bottom to add it first—usually, macOS detects nearby printers automatically.

Once your preferred printer is listed, select it and make sure it's showing as "Online." That's important—offline printers can't be set as default.

Set the Default with a Right-Click

Here's the trick: the actual option to set a default printer isn't in a top-level menu. Instead, you need to right-click (or control-click) the printer in the list and choose “Set as Default Printer.”

This context menu option doesn't always jump out at users because most assume there's a checkbox or dropdown for defaults in the main window. But no—Apple tucks it into the right-click menu.

After doing this, any print job you send without choosing a specific printer will go to your selected default.

What Happens When You Print

When you hit Command P in an app, macOS sends the job to the default printer unless you manually pick another one in the print dialog. So if you're someone who prints often and usually uses the same device, setting a default saves time.

A few things to note:

• The default printer setting applies system-wide, not per app.
• Some apps may remember the last printer used, overriding the default temporarily.
• If you're on a shared computer, other users have their own default settings.

If you switch between printers often, you might skip setting a default altogether and just choose each time you print. But for daily use, especially at home or in a small office, having a default avoids unnecessary clicks.

Resetting or Changing Later

If you move offices, buy a new printer, or share a Mac with someone else, you might want to update or remove the default later.

• To change it: Just repeat the right-click step on a different printer.
• To remove a default: Right-click the current default printer and deselect “Set as Default Printer.” There's no requirement to have one—you can leave it unset if you prefer choosing every time.

One thing to watch: sometimes after macOS updates or when rejoining a network, the default printer setting can reset or show as offline. If printing suddenly stops working, double-check this setting.

基本上就這些。

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