For macOS#
Download#
Go to Releases on GitHub and download the file named macos.zip.
Extract#
Extract the downloaded zip file to a location of your choice.
Launch#
After connecting to Tello, launch Scratch-Tello.app, which is contained in the extracted folder.
On the first launch, macOS security restrictions will prevent you from opening the application by double-clicking. Instead, hold the Control key and click the app, then select “Open” from the context menu.

Once launched, click the Extensions button in the lower-left corner and select the “Tello” extension. The blocks for programming Tello will appear.
Troubleshooting#
If Tello does not take off after running the takeoff block, commands from other blocks may be queued and waiting to execute. Running the “Reset command queue” block should resolve the issue.