How to Install GNS3 on macOS Mojave 10.14

The most popular simulator program used to prepare for the Cisco exams is GNS3! It is a very powerful network simulator program and is completely free.

How to Install GNS3 on macOS Mojave

How to Set Up GNS3 on macOS Mojave

You can use GNS3 on Windows, Linux, and macOS. After installing GNS3, all you have to do is add a few Cisco Router IOS images. The Cisco Packet Tracer is more widely used for Cisco’s beginner exams because it is easier to use.

Using GNS3 for Cisco CCNP exams is the most logical way. Because Packet Tracer is inadequate for Cisco CCNA exams.

In our previous articles, we installed the GNS3 simulator on Windows, Linux, and macOS. You can find our GNS3 installation guide in the links below.

In this article, we will examine how to install GNS3 on Mac OS Mojave 10.14.

How to Run GNS3 on Mac

If you haven’t installed macOS Mojave before, you can take a look at our links below.

After installing Mojave, follow the steps below to install GNS3.

   Step 1

Visit the GNS3 website and click the Download button.

Download GNS3

   Step 2

To use and download GNS3 on Mac, click the Download button under Mac.

Download GNS3 for Mac

   Step 3

Wait while downloading the GNS3.dmg file.

Downloading GNS3.dmg File

   Step 4

Double-click on the GNS3.dmg file and start the installation.

Running GNS3.dmg File

   Step 5

Drag and drop GNS3 into Applications in the installation window.

Drag and Drop Software into Applications

   Step 6

Wait while copying GNS3 to Applications.

Copying GNS3 to Applications

   Step 7

Double-click the GNS3 icon to launch GNS3.

Starting GNS3

   Step 8

You will receive the following warning when you download the program from an unknown source on your Mac. Click OK to close the macOS unknown development warning and go to the next step.

GNS3 can't be opened because it is from an unidentified developer

   Step 9

Open the Security & Privacy settings in macOS Mojave and click the Open Anyway button.

macOS Security & Privacy

   Step 10

Click the Open button.

Run the Program

   Step 11

After opening GNS3, select Run only legacy IOS on my computer to add the Cisco Router to GNS3 in the Setup Wizard window and click Next.

Run only legeacy IOS on my computer

   Step 12

Click Yes to grant GNS3 uBridge Root permission.

Allow uBridge Access

   Step 13

Type your macOS user account password and click OK.

Typing the Root Password

   Step 14

After successfully connecting to GNS3 Local Server, click Next.

Connection to Local Server Successful

   Step 15

In the Setup Wizard window, click Finish.

Ending the Setup Wizard

   Step 16

In the new device template window, select Add an iOS router using a real IOS image (supported by Dynamips) and click OK.

New Appliance Template

   Step 17

Click the Browse button to add the Cisco Router IOS image to the GNS3 program running on the Mac, then select the IOS image and click the Open button.

After adding the IOS image to GNS3, click Next.

Adding an IOS Image

   Step 18

Specify the Idle-PC value for the Cisco Router you added and click Finish.

Idle-PC Value Calculation

   Step 19

Create a new project on GNS3.

Creating a New Project

   Step 20

You must assign access to the GNS3 network simulator program. Click the Open System Preferences button in the warning window below.

Open System Preferences

   Step 21

After opening Security & Privacy, check the GNS3 program in the Accessibility section.

macOS Accessibility Setting

   Step 22

Drag and drop the Cisco Router you added to GNS3 to the workspace and run the Router. After opening the router’s CLI command prompt, you can learn the IOS version with the show version command.

Router Show Version

How to Use GNS3 on macOS ⇒ Video

To use GNS3 on a Mac, you can watch the video below and also subscribe to our YouTube channel to support us!

   Final Word


In this article, we have examined how to install GNS3 on Mac computers. And finally, after adding a Cisco Router to GNS3 on macOS, we tested the program’s operability. Thanks for following us!

   Related Articles


How to Add L2 Switch in GNS3
♦ How to Add L3 Switch in GNS3
♦ How to Use VPCS in GNS3
♦ How to Configure Switch Step by Step
♦ How to Install Cisco IOU

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