Where can I get the latest OS update utility for Engine? October 11, 2020 12:52 For Mac, Windows and Linux, you can always find the latest Teensy loader application on the PJRC website here: Teensy Loader Related articles What switches (buttons) are used on Engine, or where can I get replacements? Do the Engine MIDI outputs power a MIDI thru box? Why does the OS updater (Teensy loader) say "too large!" when updating the OS? How do I calibrate the CV expansion board for Engine? Configuring Engine controller knobs