2.0. 2016.05.11 / ZIP : 6.0MB. Mac / Win. Pa600QT/Operating System. 2.1.0. 2018.04.10 / ZIP : 138.3MB. KORG (USA)
You should always download system files directly from the Official Korg Pa600 QT Support Page to avoid corrupted data.
Pa300, Pa600, and Pa900 System Updaters are now available! - Korg
Touch Format & Update (if performing a reset) or follow the on-screen prompts for a standard OS update.
The current official version for the Pa600 QT is , released by Korg to improve pedal compatibility and system performance. Where to Download the Official OS
The display will prompt you to select a valid .pkg or .upd file. Use the touch screen to locate your file on the USB drive.
Do not turn off the instrument until the "Loading" process is 100% complete. Why the QT Version is Unique