I can compile error free for macOS ARM 64, but will the grid actually work (I have no ARM for testing)? When I select as target macOS ARM 64 bit, the grid and all other tms fmx components are grayed out.
macOS ARM 64 bit target is something that has been added to RAD Studio in an update. Unfortunately we cannot easily detect this, therefore there hasn't been any changes to include this target. However, this doesn't mean that the components will not work. They should behave exactly the same as with the macOS 64 bit target