Since macOS does not have a system like Windows and Linux have for allowing MiniMeters to behave like a Toolbar on the desktop, which is how "Stick" mode works, macOS users are stuck manually managing windows when using MiniMeters. My first recommendation is to use Hammerspoon to manage windows, but it requires a bit of effort.
Hammerspoon is an automation tool for macOS which uses Lua to program it. If this seems really daunting I understand, but Lua is super simple and approachable.
I would highly recommend reading the Getting Started guide on Hammerspoon's website. It will lay a good foundation for learning how to make this work as you need, but if you want to cut to the chase below I have included an example init.lua file which resizes the currently focused window to fit beneith MiniMeters in it's default position. This should be a good start for most MiniMeters users on macOS.
This code will add the following hotkey to your system Ctrl+Option+Cmd+Shift+A. If you find that difficult to press you can change the list of modifier keys or the key to be pressed from "A" to whatever you'd like.
/Users/[your username]/.hammerspoon/hyper = { "ctrl", "alt", "cmd", "shift" }
-- The default height for MiniMeters.
minimeters_height = 128
-- This makes adds a keyboard shortcut for when you press Ctrl, Option, Cmd, and
-- Shift + the 'A' key the currently focused window will resize to fit under
-- MiniMeters.
--
-- You can change the modifier keys by adjusting what is in the "hyper" table at
-- the top of this file.
hs.hotkey.bind(hyper, "A", function()
-- get the current focused window.
local focused_window = hs.window.focusedWindow()
-- get the screen that the window is on.
local screen = focused_window:screen();
-- get the free space on the screen. this is not the full resolution of the
-- display, but the space below the menubar and above the dock.
local available_screen_rect = screen:frame()
-- set the new window frame
local f = {};
f.x = available_screen_rect.x;
f.y = available_screen_rect.y + minimeters_height;
f.w = available_screen_rect.w;
f.h = available_screen_rect.h - minimeters_height;
focused_window:setFrame(f)
end)