Can't believe this is still broken! This has been present for literally years. This problem and variations of this problems have been reported many times before:

https://feedback.wizards.com/forums/918667-mtg-arena-bugs-product-suggestions/suggestions/48837083-cropping-occurs-on-16-10-screen-resolutions-on-ma

This is from 4 years ago. WTF!
https://www.reddit.com/r/MagicArena/comments/r9i6xd/cards_on_the_stack_are_cutoff_using_mtg_arena_on/

They didnt solve it because they never look at this stuff - they are a bunch of inbred halfwitted sister diddling fucktards

https://twitter.com/SpiritToken/status/1466384452393881602

I solved it with this (Wizards couldn't solve it)

On MacBook Air M1 I can select only 1140x900 which is so low.

I am on a MacBook Pro with a screen resolution of 2880x1800, but the ONLY resolution option in Arena now is 1280x800. Previously there were more options. This makes Arena unplayable on Mac.

same here! it's unplayable on mac

As of Crimson vow patch i no longer run at desktop resolution, used to be 1080, now stuck at 720. I have reinstalled drivers and the game multiple times. did they remove high res option from base download because of the mobile release? small card text is impossible to read and right side of the screen is blocked from reading cards on the stack.

Same issue

I agree, this is a major problem. The client is unplayable on MAC currently. Anyone know if this is getting fixed today?

It seems like someone forgot to account for the MacOS' resolution doubling. When I take a screen shot of the tiny little window, it says the resolution on the screen shot is 1440x900, but when I was dragging the mouse to take the screen shot, the MacOS said it was 720x450.

This! ☝🏼

This is unplayable. Even if I do suffer through the tiny window, parts of the action are cut off.