macOS retains external display settings including resolution, position, rotation, and color profiles. Plugable describes cases where an unsuitable saved configuration can leave a screen inaccessible or cause the window manager to return to the login screen. Changing an adapter does not necessarily clear those settings.

Its troubleshooting guide explains how resetting user and system display configuration files lets macOS rebuild the arrangement. Follow the full procedure for the affected system instead of deleting unrelated preferences. Reconnect the display afterward and configure its layout again, since the reset removes previously stored choices.