Fixes Magic Arena's broken full screen implementation on macOS

arena-macos-fixes.sh

# this forces Arena into full screen mode on startup, set back to 3 to reset
# note that if you go into the Arena "Graphics" preference panel, it will reset all of these
# and you will need to run these commands again
defaults write com.wizards.mtga "Screenmanager Fullscreen mode" -integer 0
defaults write com.wizards.mtga "Screenmanager Resolution Use Native" -integer 0

# you can also replace the long complicated integer bit with any other scaled 16:9
# resolution your system supports.
# to find the scaled resolutions, go to System Preferences --> Display and then
# divide the width by 16 and multiple by 9. on my personal system this ends up
# as 3456 x 1944 (versus the bizarre 1728x1117 it will very temporarily select
# when clicking the full screen option in the client
defaults write com.wizards.mtga "Screenmanager Resolution Width" -integer \
  $(system_profiler SPDisplaysDataType | grep Resolution | cut -c23-26)
defaults write com.wizards.mtga "Screenmanager Resolution Height" -integer \
  $(bc <<< "$(system_profiler SPDisplaysDataType | grep Resolution | cut -c23-26) / 16 * 9")

@Shububa Thanks a lot!
The game running with the additional command line in Epic works now also for me.

For a 16" M1 MacBook Pro I've worked out two optimal command lines for EPIC Games Launcher:

-screen-fullscreen 0 -force-metal -force-low-power-device -screen-height 1920 -screen-width 3456

and

-screen-fullscreen 0 -force-metal -force-low-power-device -screen-height 1662 -screen-width 2992

I prefer launching game in windowed mode hence -fullscreen 0. After launch I use Command+F to toggle full screen on and off as needed at the moment.

First line launches the game in max resolution possible for the 16" laptop (full width). Second line — a bit smaller resolution, better for multitasking in windowed mode, but still great after switching to fullscreen.

Hope it helps and thanks for the initial line!

@iliaslonski Thanks for posting this. This worked for me: -screen-fullscreen 1 -force-metal -force-low-power-device -screen-height 1440 -screen-width 2560

@max1c you're welcome!

how to reset this settings to default? after them my client wont work. only black screen, mouse and sound effects

@AlexDevBy it also happens to me (and others, as I see in this thread) if the client would be launched directly from its icon, not from Epic Games store. Have you tried launching from the store after you've got the black screen?

@april your last update fixed my problem! Thank you!

Hi everyone,

I just updated my mac to Monterey, and since then nothing seems to affect the screen size of Arena.
I entered those lines into a file:

defaults write com.wizards.mtga "Screenmanager Fullscreen mode" -integer 0
export WIDTH=system_profiler SPDisplaysDataType |grep Resolution | egrep -o [0-9]+ |sed -n '1p'
export HEIGHT=system_profiler SPDisplaysDataType |grep Resolution | egrep -o [0-9]+ |sed -n '2p'
defaults write com.wizards.mtga "Screenmanager Resolution Width" -integer $WIDTH
defaults write com.wizards.mtga "Screenmanager Resolution Height" -integer $HEIGHT

And ran it with sh, but nothing happens. Am I doing something wrong? Do I have to put the script file in a specific location?

Thanks for your help!

For me only this helped:

Running the following in EPIC games additional command line works for me on my 14" MacBook:

" /Users/Shared/Epic Games/MagicTheGathering/MTGA.app/Contents/MacOS/MTGA" -screen-width 3024 -screen-height 1701 -screen-fullscreen 1 "

Thanks! But I cannot manage to run it. How do I do, I just enter this into my terminal? If I do that I get a ">" symbol and nothing happens.

You have to enter this line in EPIC.
Settings-> Manage Games - > Game Settings for MTGA -> Additional Command Line Arguments -> Than enter the command.
This worked for me.

On my MacBook Air (M1, 2020), using 2560x1600 (a 16:10 aspect ratio) caused left and right sides to get cut off. I changed it to 2560x1440 (a 16:9 aspect ratio) and now it runs great. As others have also said, I prefer to start in windowed and then change to fullscreen when I want, so I use -screen-fullscreen 0.

FWIW, I use -force-metal -screen-fullscreen 1 -screen-width 3456 -screen-height 1944 on my 16" MBP and that seems to work okay.

That worked for me, thank you so much!

How do I get my resolution options back to normal?

Since the crimson vow update I have only been able to run MTGA at 1440 x 900 resolution. :(

I have a MacBook Pro (Retina, 13-inch, Early 2015) running OS 10.15.5

Prior to Crimson Vow, I had several options for resolutions that would work full screen and windowed.

I have read through the thread and your comments have bee helpful, I even learned how to input command into the Epic settings for MTGA.

Can someone please help me have more resolution options :-)

@iliaslonski those command line arguments worked perfectly. Thank you!

Hey Guys, i have the newst Macbook Air with the M1 Chip from Apple, i want to play MTG without problems. what is the latest option for this? THX!

Hey Guys, i have the newst Macbook Air with the M1 Chip from Apple, i want to play MTG without problems. what is the latest option for this? THX!

Use this: -screen-fullscreen 1 -force-metal -force-low-power-device -screen-height 1440 -screen-width 2560

Hey Guys, i have the newst Macbook Air with the M1 Chip from Apple, i want to play MTG without problems. what is the latest option for this? THX!

Use this: -screen-fullscreen 1 -force-metal -force-low-power-device -screen-height 1440 -screen-width 2560

Where did u type this in?

It's in the Epic global settings, scroll down to MTGA, extra command line options.

Bless you.

Hi guys. I tried a lot of times and can't understand what's wrong. I tried this code:

defaults write com.wizards.mtga "Screenmanager Fullscreen mode" -integer 0
defaults write com.wizards.mtga "Screenmanager Resolution Width" -integer 2560
defaults write com.wizards.mtga "Screenmanager Resolution Height" -integer 1600
defaults write com.wizards.mtga "HashFilesSkippedOnce" -integer 0

and got this error:
/Users/macbook/Desktop/gf.sh: line 1: {rtf1ansiansicpg1250cocoartf2580: command not found
/Users/macbook/Desktop/gf.sh: line 2: syntax error near unexpected token }' /Users/macbook/Desktop/gf.sh: line 2: \cocoatextscaling0\cocoaplatform0{\fonttbl\f0\fnil\fcharset0 .AppleSystemUIFontMonospaced-Regular;}'

can you help me?

Hi, I tried
defaults read com.wizards.mtga
then run the script (with and without elevation) then checking the defaults again and I see the same values, is something additional needed?

running the game through the epic store with the modified values also seem to have no effect, do i need to do a csrutil disable for the changes to apply?

These command-line options worked well on my partner's Macbook Air 2018:

-screen-width 1920 -screen-height 1080 -force-metal 1 -screen-fullscreen 1

@april 🙇 thank you!
I have a 15-inch mid-2014 Macbook 🥺 and everything looks good if I use 2880x1620. Once I enter the graphics settings though it reverts to 1920x1200 (??) and stuff gets cut off on the sides. I just exit and re-apply these settings if I accidentally do that though.

defaults write com.wizards.mtga "Screenmanager Resolution Width" -integer 2880
defaults write com.wizards.mtga "Screenmanager Resolution Height" -integer 1620

I'm trying to get my 2021 MacBook M1 13" laptop to work. I tried " -screen-fullscreen 0 -screen-height 1440 -screen-width 2560 " and also with full screen to 1, and I've included the force metal and low power options as well. With full screen set to 0, the windowed game does have a good, correct resolution and the text is readable, and I get many options for resolutions in the Graphics settings of MTGA. But if I then click 'full screen' in-game, it goes right back to 1440x900 and it being the only option. Then when I uncheck fullscreen, it goes back to full-resolution windowed. I don't want to play windowed, so I'm at a loss. Any further ideas? I have not tried the original .sh version, as I don't understand it and figure its for older Macs? I'm new to Macs overall...

Hey @Rkoz-01 what is the native resolution of your screen? You can find that with System Preferences --> Display. Use the width as-is then the height use the formula width/16*9. Use screen-fullscreen=1 for sure if you want full screen, going through the settings menu kills the custom settings.

native per google is 2560x1600 (I don't see the resolution in system preferences, just "Default for Display"). I have tried both screen-fullscreen = 0 and 1, and in both cases, the game's fullscreen checkbox has the correct resolution when not full screen, but the bad resolution when full screen. I have tried both 1600 and 1440 for the height. These are just the command line options in Epic, am I supposed to do something with the .sh file first?

Also, I can't be sure (can I?), but it seems like the game's loading screen is sharp and may be full-res, before it fully launches to the main menu and is low-res.

This is amazing - thank you so very much!