Whether macOS puts your windows back after an unplug, a sleep, or a dock hiccup varies wildly between Macs and monitors, and nothing published, Apple's documentation included, fully explains why. So we are mapping it with data: what your monitor's firmware reports, what thousands of other units of the same model report, and what people actually observe on their own desks. We have since found two Mission Control settings that fix the restore behavior on many setups, but timing failures from dock sleep and certain apps still slip through even when they are set right, which is the half this page is still mapping. The one claim we make is about Putback itself: it restores your layout deterministically, whatever macOS does. Background and the exact settings in why your Mac windows move when you unplug a monitor.
Not sure of your monitor's exact signature? Search its make and model against thousands of public EDID reports.
Model data derived from the linuxhw/EDID open dataset (CC BY 4.0).
Exact check for your unit
A model search above is statistics across many units of that model. The command below reads your actual monitor's firmware, this specific unit, right now.
Step 1
Open Terminal, keep the display you want to test connected, and run:
ioreg -lw0 | grep "EDID UUID"Step 2
Paste the output below. Nothing is uploaded: this runs entirely in your browser.