[GH-ISSUE #575] More permanent display ID for preference storage on Apple Silicon #428

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opened 2026-05-05 05:59:00 -06:00 by gitea-mirror · 0 comments

gitea-mirror commented

2026-05-05 05:59:00 -06:00

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Originally created by @waydabber on GitHub (Sep 10, 2021).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/575

Originally assigned to: @waydabber on GitHub.

Before opening the issue, have you...?

Searched for existing issues
Looked through the wiki
Updated MonitorControl to the latest version (if applicable)

Describe the bug

On Apple Silicon CGDirectDisplayID is not so unique anymore (it wasn't guaranteed to be unique on Intel as well but in practice it was), just a simple 0,1,2... number. Since all display related UserPreferences were stored tagged with CGDirectDisplayID, if the user replaces the display (or connects them in a different order), wrong settings will be applied.

Steps to reproduce

Use app with a display.
Replace display with a different one.
See the old display's settings applied to the replacement.

Expected behavior

All display settings should be stored using a more unique identifier in the UserPreferences database.

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: 12 Monterey
- Mac model: M1 MBA
- MonitorControl version: 3.0.0
- Apple Silicon/M1 (yes or no): yes

Originally created by @waydabber on GitHub (Sep 10, 2021). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/575 Originally assigned to: @waydabber on GitHub. ### Before opening the issue, have you...? - [X] Searched for existing issues - [X] Looked through [the wiki](https://github.com/MonitorControl/MonitorControl/wiki) - [X] Updated MonitorControl to the latest version (if applicable) ### Describe the bug On Apple Silicon CGDirectDisplayID is not so unique anymore (it wasn't guaranteed to be unique on Intel as well but in practice it was), just a simple 0,1,2... number. Since all display related UserPreferences were stored tagged with CGDirectDisplayID, if the user replaces the display (or connects them in a different order), wrong settings will be applied. ### Steps to reproduce 1. Use app with a display. 2. Replace display with a different one. 3. See the old display's settings applied to the replacement. ### Expected behavior All display settings should be stored using a more unique identifier in the UserPreferences database. ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: 12 Monterey - Mac model: M1 MBA - MonitorControl version: 3.0.0 - Apple Silicon/M1 (yes or no): yes ```