Fixes Magic Arena's broken full screen implementation on macOS

mtga-fix.plugin.zsh

# Fixes the fullscreen resolution for Magic the Gathering Arena on macOS.
#
# MTGA doesn’t account for the MacBook Pro notch, so it defaults to a resolution
# that’s too wide for the screen, and cuts off important information (like the
# stack). This script sets the resolution to a scaled 16:9 resolution that fits
# the screen.
#
# Forked from april/arena-macos-full-screen-fixes.sh
# https://gist.github.com/april/ef679cf5719cc5a2ba6a55da20869ffa
function mtga_fullscreen_fix {
  # Forces MTGA into fullscreen mode on startup, set to 3 to reset
  # NOTE: Changing anything in the MTGA “Graphics” preference panel will reset
  # these values, and then you’ll need to run this script again.
  defaults write com.wizards.mtga "Screenmanager Fullscreen mode" -integer 0
  defaults write com.wizards.mtga "Screenmanager Resolution Use Native" -integer 0

  # Get the main display resolution, minus notch
  IFS=',' read -r width scaled_height <<< "$(
    system_profiler SPDisplaysDataType -json | jq -r '
      .SPDisplaysDataType[].spdisplays_ndrvs[]
      | select(.spdisplays_main == "spdisplays_yes")
      | ._spdisplays_pixels
      | split(" x ")[0]
      | tonumber
      | [., . / 16 * 9]
      | join(",")
    '
  )"

  defaults write com.wizards.mtga "Screenmanager Resolution Width"  -integer $width
  defaults write com.wizards.mtga "Screenmanager Resolution Height" -integer $scaled_height

  if [[ $? -ne 0 ]]; then
    echo "$fg[red]"
    echo "✗ Failed to set MTGA fullscreen resolution"
    echo "$reset_color"
    return 1
  elif [[ "$1" == "--array" ]]; then
    echo "$width,$scaled_height"
  else
    echo "$fg[green]"
    echo "✓ MTGA fullscreen resolution set to $width ✕ $scaled_height"
    echo "$reset_color"
  fi
}

~README.md

Magic: The Gathering Arena - MacBook Pro Fullscreen Fix

An Oh My Zsh plugin that fixes the fullscreen resolution for Magic: The Gathering Arena on macOS.

MTGA doesn’t account for the MacBook Pro notch, so it defaults to a resolution that’s too wide for the screen, and cuts off important information (like the stack).

This script sets the resolution to a scaled 16:9 resolution that fits your screen.

Note

As an alternative, you can also set MTGA to “scale to fit below built-in camera”, which won’t require this script, but will display a bit narrower.

Installation

To install, clone the repository into your Oh My Zsh plugins directory:

git clone https://gist.github.com/31bc6de689f6e6561607e837984de84f.git ~/.oh-my-zsh/custom/plugins/mtga-fix

Then, add mtga-fix to your plugins array in your .zshrc file:

plugins=(
  …
  mtga-fix
)

Usage

After installing the plugin, you can use the mtga_fullscreen_fix command to set the resolution for MTGA.

mtga_fullscreen_fix

This will output something like:

$ mtga_fullscreen_fix

  ✓ MTGA fullscreen resolution set to 3024 ✕ 1701

License

Feel free to modify and use this script as you wish.

Acknowledgements

• april/arena-macos-full-screen-fixes.sh for the original script.