If Arduino IDE hangs on start-up – Arduino Help Center

If Arduino IDE stops responding or never finishes opening, follow these steps to troubleshoot the problem.

1. Check your internet connection

On the first run after a fresh installation, Arduino IDE downloads and installs additional essential components. If it cannot install these components, Arduino IDE may hang during start-up.

Make sure your computer is connected to the internet.
Close all Arduino IDE windows.
Start Arduino IDE again.

Note

After the required components are installed, an internet connection is not required to edit, compile, and upload sketches. Internet-dependent features, such as Library Manager, will not be available while your computer is offline.

2. Examine the command-line logs

If Arduino IDE still hangs, start it from a terminal to view its diagnostic output.

Linux

Close all Arduino IDE windows.
Open a command-line terminal in the folder containing the Arduino IDE AppImage.
Enter the following command, replacing <version> with the Arduino IDE version number:
```
./arduino-ide_<version>_Linux_64bit.AppImage
```
Press Enter.

macOS

Close all Arduino IDE windows.
Open macOS Launchpad.
Search for terminal.
Select Terminal.

Enter the following command:

"/Applications/Arduino IDE.app/Contents/MacOS/Arduino IDE"

Press Enter.

Windows

Close all Arduino IDE windows.
Open Windows File Explorer.
Open the Arduino IDE installation folder.

The default installation location is usually one of the following:
```
C:\Program Files\Arduino IDE
```
```
C:\Users\<username>\AppData\Local\Programs\Arduino IDE
```
Replace <username> with your Windows username.

Note

The AppData folder is hidden by default. To show it in File Explorer, open View and enable Hidden items.
Hold Shift and right-click an empty area inside the Arduino IDE installation folder.
Select Open PowerShell window here.
Enter the following command:
```
& ".\Arduino IDE"
```
Press Enter.

Review the logs

Return to the terminal or PowerShell window. Wait until Arduino IDE appears to be hanging. This may be indicated by:

No additional output appearing in the terminal.
The same output appearing repeatedly.

Look for error messages in the output. Searching for an error message online may help you identify the cause and find a solution.

If you cannot resolve the problem, create a post in the Arduino IDE 2.x section of the Arduino Forum or contact Arduino Support.

Describe what happens when Arduino IDE starts and include the complete command-line output in your forum post or support request.