Glaube nicht, dass das mit iCloud zusammenhängt.
Die AI spuckt zur korrekten Frage für Sequoia dies aus: 
## Dock Preferences Files on macOS 15
If the **Dock** is misbehaving in macOS 15 (Sequoia or similar), removing or resetting its corresponding user preferences file is often the recommended troubleshooting step.
### Main Dock Preferences File
- The key file for Dock settings is:
  - `~/Library/Preferences/com.apple.dock.plist`
This file contains user customizations, such as app and folder shortcuts, Dock size, position, magnification, and other related settings[1][2][3][4].
### Additional Dock-related Files
- Sometimes, you may also see:
  - `~/Library/Preferences/com.apple.dock.db` (contains recent apps/folder info; mostly seen in older macOS versions)[5].
  - Backups after reset: `~/Library/Preferences/com.apple.dock.plist.old` (created as a safety backup by some reset methods)[6].
However, the primary file responsible for user Dock preferences is always `com.apple.dock.plist`.
## How to Reset or Delete Dock Preferences
1. **Locate the File:**
   - From Finder, use the **Go > Go to Folder** menu and enter:
     ```
     ~/Library/Preferences/
     ```
   - Find and move `com.apple.dock.plist` to the Trash[7][8][4].
2. **Reset the Dock from Terminal (Recommended):**
   - Open **Terminal** (Applications > Utilities > Terminal).
   - Enter:
     ```
     defaults delete com.apple.dock; killall Dock
     ```
   - This command deletes the preferences file and restarts the Dock. The Dock will revert to factory defaults (default icons, size, position, etc.)[2][9][10][11].
## What Happens After Deleting/Resetting
- macOS automatically regenerates a fresh `com.apple.dock.plist` when the Dock restarts[2][9][11].
- Any custom Dock arrangements, including added/removed apps and settings like size and position, will be reset to the original defaults.
- If any Apple default apps are missing, their icons will show as a question mark until you reinstall or remove them yourself[9][10].
## Summary Table
| File Name                              | Path                                   | Purpose                                 |
|-----------------------------------------|----------------------------------------|-----------------------------------------|
| com.apple.dock.plist                    | ~/Library/Preferences/                 | Main Dock preferences (apps, size, etc.)[1][4] |
| com.apple.dock.plist.old (if present)   | ~/Library/Preferences/                 | Backup after a reset (sometimes created)[6] |
| com.apple.dock.db (if present)          | ~/Library/Preferences/                 | Ancillary Dock data; rare in new macOS[5] |
**Deleting or resetting `com.apple.dock.plist` is safe and a common troubleshooting step for Dock issues in macOS.** After removal, simply log out or restart the Dock using the Terminal command to rebuild your preferences from scratch. No important system or user data beyond your Dock layout and settings will be affected[2][9][10][11].
Sources
[1] Edit property lists in Terminal on Mac - Apple Support 
https://support.apple.com/guide/terminal/edit-property-lists-apda49a1bb2-577e-4721-8f25-ffc0836f6997/mac
[2] How to reset your Mac Dock to its default apps and settings 
https://www.idownloadblog.com/2023/05/23/how-to-reset-mac-dock/
[3] In what Folder are Dock Applications are stored? 
https://apple.stackexchange.com/questions/268087/in-what-folder-are-dock-applications-are-stored
[4] where is the .plist of the dock located? - Mac Support 
https://macosx.com/threads/where-is-the-plist-of-the-dock-located.45943/
[5] where are "desktop" and "dock" settings stored? 
https://discussions.apple.com/thread/1270425
[6] macOS Sequoia 15.0.0 help - Reddit 
[7] Dock not creating plist file 
https://discussions.apple.com/thread/253497573
[8] Dock keeps reseting to its default settin… 
https://discussions.apple.com/thread/6895385
[9] How to reset your macOS Dock to default settings 
https://milanaryal.com.np/how-to-reset-your-macos-dock-to-default-settings/
[10] How To Reset The Mac Dock To Default 
https://www.technobezz.com/how-to-reset-the-mac-dock-to-default
[11] How to reset the Mac Dock to default 
https://www.imore.com/os-x-power-tips-resetting-your-dock-its-default
[12] Script to customize Dock preferences on Mac - Hexnode Help Center 
https://www.hexnode.com/mobile-device-management/help/script-to-customize-dock-preferences-on-mac/
[13] Discovering macOS Settings with PlistWatch 
https://developer.okta.com/blog/2021/07/19/discover-macos-settings-with-plistwatch
[14] System Preferences > Dock > "posit… - Apple Support Communities 
https://discussions.apple.com/thread/251718884
[15] Do you know in which file the position of the desktop icons ... 
[16] How to edit a .plist file which contains binary data : r/macapps 
[17] Command to reset the dock back to default : r/macsysadmin 
[18] File Location of Doc Shortcuts in Mac OS - Super User 
https://superuser.com/questions/1295581/file-location-of-doc-shortcuts-in-mac-os
[19] Are You Docking Kidding Me?. .LNK persistence on macOS? 
https://posts.specterops.io/are-you-docking-kidding-me-9aa79c24bdc1
[20] How-To: locate plist files used for specific settings 
https://www.cnet.com/tech/computing/how-to-locate-plist-files-used-for-specific-settings/