Scrolling on Mac has been broken for years, and never fixed
As multiple sources show (like https://www.reddit.com/r/MagicArena/comments/u47dfi/am_i_missing_something_or_is_the_macos_client/) and despite the questionable closing of similar reports (https://feedback.wizards.com/forums/918667-mtg-arena-bugs-product-suggestions/suggestions/50835080-scrolling-doesn-t-work-on-mac), and of course in my own experience of many years with MTGA, scrolling has never worked on macOS. You cannot scroll in the store as the most minuscule move on the wheel/trackpad will jump to one end or the other, leaving as the only option to try to hunt for the dark-on-dark scrollbar and drag it, same when browsing card in the deck builder, even though the arrows are an acceptable, but not comfortable, workaround. You would think that such a simple bug would have been fixed by now, especially when it touches the part that brings revenue. But no. How such a successful game can be content with broken scrolling, broken tutorials, and the broken Epic Games Launcher (that has so many bugs of its own, like typing the confirmation code doesn't work until you find the trick of pasting it), is beyond me.