Yes. Our Marvel Snap deck tracker supports macOS. However, given the different environments, there are some limitations. The macOS Companion app provides collection uploading and matches stats tracking. However, at this time we can't replicate the in-game overlay.
Make sure you are using the Appstore Marvel Snap version since we don't support the Steam version on macOS.
The Untapped.gg Companion for Marvel Snap is also available for Android devices. You can find more about it here.