also for client steps :
https://api4all.pro/MacDump/HFZ/
What is required ?
* The MacBook/iMac should be in a locked state (i.e., password-protected, in Lost Mode or iCloud Clean Mode).
* A USB OTG or USB-C port is needed.
Steps:
1. Access Recovery Mode:
* For MacBook T2: Boot the device in Recovery Mode by holding CMD + R.
* For MacBook M1, M2, M3: Hold the Power Button and choose Recovery Mode.
2. Execute Key Combination:
* Once the Mac is booted, hold all 5 keys: Control + Option + Command + Dot + Shift.
* Wait for a few seconds until a red screen appears.
3. Dump Diagnostic File:
* A Finder window will pop up.
* Insert a USB drive and save the diagnostic file by choosing Save to USB.
4. Extract Information:
* Reboot the Mac and double-click the saved .tgz file to extract it.
* Upload this file to a website that processes it, and it will dump the Name and Apple ID of the owner.