macos sierra

When you turn your Mac on, do you notice the blurred image behind the login screen? By default it’s a blurred version of Sierra’s iconic wallpaper, or a blurred version of your current wallpaper.

打開Mac時，您是否注意到登錄屏幕后面的圖像模糊？ 默認情況下，它是Sierra標志性墻紙的模糊版本，或者是當前墻紙的模糊版本。

Have you ever wished this image wasn’t blurred? Or that it was different than your default wallpaper? As it turns out, the user can control what shows up here, but it takes a few steps. Here’s how to configure this image to look exactly the way you want it to. This method works in macOS Sierra, Yosemite, and El Capitan.

您是否曾經希望此圖像不模糊？ 還是與您的默認壁紙不同？ 事實證明，用戶可以控制此處顯示的內容，但這需要一些步驟。 這是配置此圖像以使其完全符合您想要的方式的方法。 此方法適用于macOS Sierra，優勝美地和El Capitan。

簡單方法：更改桌面墻紙 (The Easy Way: Change Your Desktop Wallpaper)

If you use a single custom wallpaper on your Mac, you’re probably wondering why this article exists. That’s because changing the blurred image behind your login screen is as simple as changing your desktop wallpaper.

如果在Mac上使用單個自定義墻紙，您可能想知道為什么這篇文章存在。 那是因為更改登錄屏幕后面的模糊圖像就像更改桌面墻紙一樣簡單。

But there are some catches. For example: if your wallpaper is a rotating folder of images, macOS uses the default Sierra wallpaper instead. If you want to use one of your own images, you can do that, without ditching your rotating collection of images.

但是有一些陷阱。 例如：如果您的墻紙是旋轉的圖像文件夾，則macOS將使用默認的Sierra墻紙。 如果要使用自己的圖像之一，則可以這樣做，而不必放棄旋轉的圖像集合。

First, right-click your desktop, then click “Change Desktop Background.”

首先，右鍵單擊您的桌面，然后單擊“更改桌面背景”。

(Note: if you use multiple desktops in Mission Control, make sure that you open this window on your left-most desktop, labeled “Desktop 1.”)

(請注意：如果您在Mission Control中使用多個桌面，請確保在最左側的桌面上打開此窗口，并標記為“桌面1”。)

Now change your wallpaper to whatever you’d like your login screen’s background to be.

現在，將您的墻紙更改為您希望登錄屏幕背景的任何內容。

If you want to switch back to the rotating folder you had before, you can do that, but first let’s make sure that macOS has set your new image as the background for your login screen. Open the finder, then choose Go > Go To Folder. Type /Library/Caches ?and click Go.

如果要切換回以前的旋轉文件夾，可以執行此操作，但首先請確保macOS已將新映像設置為登錄屏幕的背景。 打開查找器，然后選擇“轉到”>“轉到文件夾”。 鍵入/Library/Caches ，然后單擊“執行”。

In this folder, you should see an image here named “com.apple.desktop.admin.png,” and if your changes took hold this image will be a blurred version of whatever you set as your wallpaper. Sometimes this will take a minute, so be patient.

在此文件夾中，您應該在此處看到一個名為“ com.apple.desktop.admin.png”的圖像，如果您的更改被保留，則該圖像將是您設置為墻紙的圖像的模糊版本。 有時這需要一分鐘，因此請耐心等待。

Once you see your image, go ahead and turn your rotating wallpaper back on, if you wish—in our tests this did not affect this file. Now log out of your account or restart your Mac to see your new login screen.

看到圖像后，請繼續打開旋轉的墻紙(如果需要)，在我們的測試中，這不會影響此文件。 現在，退出您的帳戶或重新啟動Mac，以查看新的登錄屏幕。

It’s working! Note that, if you have a rotating wallpaper, this change will not affect your lock screen, which will always show a version of your current wallpaper (on Desktop 1.) The login screen, however, is now set as a blurred version of your preferred image.

工作正常！ 請注意，如果您有旋轉的墻紙，此更改將不會影響鎖定屏幕，鎖定屏幕將始終顯示當前墻紙的版本(在桌面1上)。但是，現在將登錄屏幕設置為您的模糊屏幕首選圖片。

使用不模糊的圖片作為登錄屏幕 (Use An Unblurred Picture For Your Login Screen)

If you’d rather your login screen not be blurred, you can do that too! I recommend first following the steps above, so that there is an image in the /Library/Caches folder. Then, copy that image to your desktop by dragging it there.

如果您希望您的登錄屏幕不模糊，您也可以這樣做！ 我建議首先按照上述步驟進行操作，以便/ Library / Caches文件夾中有一個映像。 然后，通過拖動將圖像復制到您的桌面。

We’ll use this image in a little bit. First, open whatever image you’d like to show up behind your login screen with Preview. Select the entire canvas (Command+A), then copy it (Command+C).

我們將稍微使用此圖像。 首先，使用“預覽”打開您想要在登錄屏幕后顯示的任何圖像。 選擇整個畫布(Command + A)，然后將其復制(Command + C)。

Next, head to your desktop and open the file you copied from /Library/Caches. Paste (Command+V) what you just copied.

接下來，轉到桌面并打開從/ Library / Caches復制的文件。 粘貼(Command + V)您剛剛復制的內容。

You will need to move and resize what you’re pasting quite a bit in order to get everything just right. When you’re done, save the image (Command+S). Head back to your desktop, and drag your edited image to the /Library/Caches folder. You will be asked if you’d like to replace the file that’s there; click “Replace.”

您將需要移動并重新調整粘貼內容的大小，以使所有內容正確無誤。 完成后，保存圖像(Command + S)。 回到桌面，然后將編輯后的圖像拖到/ Library / Caches文件夾中。 系統將詢問您是否要替換那里的文件； 點擊“替換”。

You’ve now placed your custom background image. Go ahead and log out of your user account to see how it looks:

現在，您已經放置了自定義背景圖片。 繼續并注銷您的用戶帳戶，以查看其外觀：

It worked! In my case, however, the white maple leaf is making it hard to read the white text used by macOS. To fix this, I found a different version of this image where the leaf is blue.

有效！ 但是，以我為例，白色的楓葉使macOS使用的白色文本難以閱讀。 為了解決這個問題，我找到了該圖像的另一個版本，其中葉子是藍色的。

Much better! This version puts the darker part of the image behind the text, which makes it easier to read everything. You’ll probably have to experiment with this a little yourself, but to avoid problems favor dark images over light ones, and simple images over complex ones.

好多了！ 此版本將圖像的較暗部分放在文本后面，這使閱讀所有內容變得更加容易。 您可能需要自己稍微嘗試一下，但是為了避免出現問題，青色圖像勝于淺色圖像，而簡單圖像勝于復雜圖像。

If you’re a Photoshop guru, you might prefer making an image yourself over messing around with Preview in this way. You can do that, but the image you create needs to meet specific criteria. It must be:

如果您是Photoshop專家，那么您可能更喜歡自己制作圖像，而不是用這種方式弄亂預覽。 您可以這樣做，但是您創建的圖像需要滿足特定條件。 肯定是：

• A PNG file
  PNG文件
• The same exact resolution as your primary display
  與主顯示器相同的精確分辨率
• RGB, sRGB, or Adobe RGB color mode.
  RGB，sRGB或Adobe RGB色彩模式。
• 8bit colors
  8位色彩
• Unlocked background layer
  解鎖背景層
• Named “com.apple.desktop.admin.png”
  名為“ com.apple.desktop.admin.png”

In our tests, even doing all these things can still be hit-or-miss, so we suggest using the Preview method. It’s just simpler.

在我們的測試中，即使執行所有這些操作仍然可能會失敗，因此我們建議使用Preview方法。 簡單一點。

向您的登錄屏幕添加自定義消息 (Add a Custom Message To Your Login Screen)

You may have noticed, in the screenshots above, that I’ve left a custom message in my login screen. The idea is that if I lose my Mac, some good person may try to return it. It’s wishful thinking, perhaps,?but it’s worth a shot.

在上面的屏幕截圖中，您可能已經注意到，我在登錄屏幕上留下了一條自定義消息。 這個想法是，如果我丟失了Mac，某些好人可能會嘗試將其退還。 也許是一廂情愿，但值得一試。

If you’d like to leave your own such message, it’s easy! First, open?System Preferences and head to Security & Privacy.

如果您想留下自己的信息，那很簡單！ 首先，打開“系統偏好設置”，然后轉到“安全和隱私”。

Make sure “Show a message when the screen is locked” is checked.

確保選中“在屏幕鎖定時顯示消息”。

Next, click “Set Lock Message,” then enter whatever message you’d like.

接下來，點擊“設置鎖定消息”，然后輸入您想要的任何消息。

I recommend leaving a phone number or email address. You could also mention a cash reward for returning the laptop, if you believe money enhances human kindness. It’s up to you.

我建議留下電話號碼或電子郵件地址。 如果您相信金錢可以增強人類的友善感，您還可以提及歸還筆記本電腦的現金獎勵。 由你決定。

翻譯自: https://www.howtogeek.com/howto/29503/how-to-change-the-logon-background-in-os-x/

macos sierra

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