Make OSX App run without a dock icon

in IDE menu bar , select Project -> Options... -> Version Info

add new key and value => NSBGOnly  , 1

That's all, compile your firemonkey app and run it , result like this:

If hide this app by calling form1.hide, it will be hard to find the gui for this app,

so you need to implement menu item like windows system tray icon, something like this one,