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Pegasus Monitor Control

Pegasus Monitor Control

Control you PG27UCDM from your Apple Silicon Mac device.

Warning

This app was made on a caffeine rush, with no knowledge of Swift nor of the DDC protocol.

I have almost 0 interest in maintaining it on the long run, so you get what you see.

Feel free to fork, pull request, to improve this software, I might learn a thing or two.

Feel also free to open issues, with no guarantees I will address them.

Features

This app mimicks 99% of what the ASUS Display Widget Center does on Windows.

With no AI, more caffeine, a sprinkle of quirks, no internal knowledge of the VCP codes ASUS has and no team to code it.

Known quirks

  • AURA lights aren't controllable from the app itself (can be accessed by via OSD via key combos)
  • PIP source misses DisplayPort (I have no idea what ASUS has done with this VCP code, it's odd)
  • Swapping HDR presets might black out the screen (at least it does over USB-C/DPalt), nothing an input source swap from OSD can't fix
  • Adjustable HDR works only on HDR Console presets (both Dolby and "standard")

Screenshots

Click me

Screenshot 2025-05-12 alle 06 12 22 Screenshot 2025-05-12 alle 06 12 23 Screenshot 2025-05-12 alle 06 11 34 Screenshot 2025-05-12 alle 06 12 34 Screenshot 2025-05-12 alle 06 12 38 Screenshot 2025-05-12 alle 06 12 41 Screenshot 2025-05-12 alle 06 12 47 Screenshot 2025-05-12 alle 06 12 52 Screenshot 2025-05-12 alle 06 12 56 Screenshot 2025-05-12 alle 06 13 00 Screenshot 2025-05-12 alle 06 13 25

License

The entirety of this repository except where the author in the header of the file isn't "Francesco Manzo", is under GPLv3 license.

For the daring

I will upload a sheet with all the findings I have about this monitor.

Maybe someone more knowledgeable than me, might figure out something that I didn't.

Note

For developers, don't hate my formatting, I don't know Swift indent rules nor general formatting etiquette, what you see it's gentle concession of XCode's formatting tools.

Thanks to @waydabber and @alin23

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