Step #2: The Teensy Loader Application
The Teensy Loader program communicates with your Teensy board when the HalfKay bootloader is running, so you can download new programs and run them.Update: Teensy LC & 3.x & 4.x are supported by Teensyduino. After installation, Teensy Loader is in hardware/tools. It is run automatically when using Verify or Upload within the Arduino software.
Teensy Loader is available for these operating systems:
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