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Mac OS X (10.5.7)

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While using Mac you might have tried to open a recently installed bottled Mac X application or .dmg file. Well while doing so, you might have seen this error with dialog box: “The application x11 could not be opened. Failed to activate core devices”. In this article you will learn How to fix The application x11 could not be opened error in Mac – Failed to activate core devices. We have tried and tested all the below solutions.

Just launch X11.app rather than XQuartz.app to get the older server. If you want to make Apple's X11.app the default server (owning the launchd $DISPLAY socket), then you should disable the org.macosforge.xquartz.startx.plist as described in the first question. After logging out and back in, Apple's X11.app will be default. If you still want to remove XQuartz.app from your system, you can do. Go to Leopard’s Applications: Utilities folder and double-click on X11.app. That will open xterm. At first, you might think it’s just another command-line tool like Mac OS X’s Terminal.

How to fix The application x11 could not be opened error in Mac

Well we also had encountered this error while using the Mac. So we troubleshooted this error and were able to run the desired application with ease. Now we will give you the best solution which will solve the problem first. The below solution was tried and tested on MacOS HighSierra 10.13.3 version when the error was occurred.

Solution

Step 1

Restart your Macbook or iMac.

To Restart your computer, click on the Top right Apple icon and in the drop down, select Restart option.

Step 2

When the Sytem is starting, Press CMD⌘+R.

So keep the keys pressed until you see the white screen changed to Utility Screen

Step 3

In the Utility screen On top Menu Bar, go to Utilities > Terminal.

Click on Utilities Tab and then you can find Terminal in dropdown

Step 4

Type csrutil disable and press Enter key.

You will now see a message to restart your machine.

Restart your device by clicking on the Top right Apple icon and in the drop down, select Restart option.

If the above solution is not working then you can go for this solution.

Alternative Solution

Step 1

Visit www.xquartz.org

Step 2

Click on filename and download it.

Step 3

Install Xquartz on your mac

This will help you in fixing the solution.

If you have tried the above 2 solutions and still getting the error then this might surely work for you:

Alternative Solution 2

Install X11 Mac

Well now this will surely work for you if you are looking to install windows games on your Mac.

Step 1

Visit Portingkit.com Then click on Download.

Step 2

X11 Apps Not Working On Mac Os

Install the application from the above website. Then you can open the software.

Step 3

There you can Click on the Library Tab. You can click on “Add application” and add the application which you were trying to open and had got the error.

Mac Os X X11

With this you can easily play and enjoy Windows games on your Mac.

Let us know your experience in comments below. Did this guide helped you in resolving the error? Would love to know your thoughts in the comments below.

Mac X11 App

X11 Apps Not Working On Macbook

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