You likely hit your Mac’s external-display limit. M1/M2 (base) support one external display total. M1 Pro/Max and M2 Pro/Max support more.
Options:
- Use View instead of another external monitor on M1/M2 (base).
- On Pro/Max models, ensure you’re within the supported number of displays and connect View directly (avoid daisy-chains).
-
Re-arrange displays in System Settings → Displays (turn off mirroring if needed).
See also: