New bug introduced with today's Edge of Eternities Alchemy update (v2025.51.0):

The left and right edges of the screen are suddenly cropped off on macOS when in fullscreen mode. This means companions, graveyards, and cards on the stack are now only partially visible (see attached screenshot).

We've historically been able to force a correct fullscreen resolution by entering a custom launch argument in the Epic Games Launcher (e.g. -screen-fullscreen 1 -screen-width WWW -screen-height HHH), however the -screen-height parameter is now being ignored, and the MTGA client is being displayed in a 16:10 ratio (which on my 16:9 MacBook Pro screen, is causing the horizontal cropping).

Coincidentally, this exact same issue occurred after the Tarkir Alchemy update, see https://feedback.wizards.com/forums/918667-mtg-arena-bugs-product-suggestions/suggestions/49816448-in-game-screen-resolution-changed-to-16-10-on-maco