To download your code into your EV3 brick, from Mac or Linux, follow these instructions (downloading from Windows? read this):
1. Click the download button at the top of the screen
2. Download the .jar file to your computer
2.1 Make sure your LEGO MINDSTORMS EV3 brick is running Lejos.
2.2 Click Download
3. Transfer the .jar file to the EV3 brick
3.1 Open the folder where the file was downloaded.
3.2 Right click any where in the folder, and choose Open in Terminal.
3.3 Run the following command:
scp -o StrictHostKeyChecking=no -oKexAlgorithms=+diffie-hellman-group1-sha1 downloaded_file_name.jar * firstname.lastname@example.org:../lejos/programs/
make sure to change the file name
when asked for a password, just hit the enter key.
3.4 You will find the program on the robot under the same name of your downloaded file.
After downloading your code, locate it on the EV3 brick and run it.