The graphical simplicity of most of the available games will probably ensure wide compatibility across different Mac hardware.
The games I tried ( Punch Planet, Hot Lava, and The Enchanted Planet) ran tolerably if not exceptionally well, and some games do include graphics settings you can tweak to make things look or run better on different hardware. The Apple Arcade app pages don't list detailed system requirements, just whether a game works on your Mac or not, so there's no way to know how well games will actually run on your system without downloading and trying them first. Second, the difference between the slowest and fastest GPUs in different Macs is a lot wider than it is in iOS and iPadOS, spanning from old 2012 Macs with Intel's HD 4000 integrated GPU all the way up to MacBook Pros and iMacs with Vega-based dedicated GPUs from AMD. The Mac version of Apple Arcade will have a couple of unique challenges-first, macOS just isn't as popular for games as iOS is, and this is reflected in the more limited selection of available games. Apple's $5-per-month-per-family game subscription service, already available in iOS and iPadOS and tvOS, is also available on the Mac, and the same subscription covers all the same platforms.
