Multiple external monitors displayed incorrectly in Preferences > Sketches

Most appropriate sub-area of Processing 4?

Other (specify if possible)

Processing version

4.5.2

Operating system

verified on macOS 26.5.1 Tahoe

Bug description

When more than one external monitor is connected, the monitor layout shown in Preferences → Sketches → Run sketches on display does not match the actual display configuration.

Issues observed in the screenshot below (by @MickaelLafontaine):

• Seven displays are connected, but the UI shows only five. (using a monitor controller to connect to 4 displays from one input, appearing as a single display is expected)
• Two displays are shown as selected target display. Only one target display should be possible at a time.
• Multiple displays share the same labels (1 or 2) instead of each having a unique number (1 to 5).

Steps to reproduce this

1. Connect multiple external monitors.
2. Open Preferences → Sketches.
3. Look at the Run sketches on display monitor selector.

snippet

n/a

Additional context

Initially mentioned here: https://github.com/processing/processing4/issues/1426#issuecomment-4780421476

Would you like to work on the issue?

No, I’m just reporting the issue

从 Preferences → Sketches 开始，在 macOS 上连接多个外接显示器后重现该问题。检查 Run sketches on display monitor selector，并确认显示的布局与实际配置一致、仅选择了一个目标显示器，并且每个显示器都有唯一的标签。