Nice, I can see the appeal having familiar UI on Mac.
Even though I am not your target audience (linux i3 user myself), I would be interested in knowing how much "hacking" the macOS system is required to do this. Is it hard to get a list of running apps for your Task Bar? Is it hard to list the apps for the menu? How about keeping it all "on top" while other windows e.g. get maximized/minimized/full-screen, etc?
Even though I am not your target audience (linux i3 user myself), I would be interested in knowing how much "hacking" the macOS system is required to do this. Is it hard to get a list of running apps for your Task Bar? Is it hard to list the apps for the menu? How about keeping it all "on top" while other windows e.g. get maximized/minimized/full-screen, etc?