target display mode
here's yet another reason why old macs are awesome. you can pick up an old 27"imac, more than ten years old, for €112.50. it will have 8gb of ram, a good as new magic keyboard and a 500gb ssd. it will only run high sierra (= no dark mode but ok) but get this you can plug an old macbook air into it (which will run mojave so dark mode) and use it as a display omg i love this world and this life and i love old machines which are undervalued by people because they are stupid and so they sell them cheap even though the new machines they desire are less functional than the old machines.