Clone one Mac and restore it on multiple Macs
On the Mac that you wanted to clone


Connect an external Hard Drive to your Mac.
Open Time Machine in System Preferences and setup the backup of your system.

This may take some hours depending on your type of external drive.


On the other Mac where you want to transfer that clone


Shut down the system
Connect the Time Machine backup disk created earlier
Power on Mac whilst holding the Command + R buttons. This will take you to recovery.
Choose Restore from Time Machine backup and press Continue.


This will make an exact clone of the first Mac.
For other systems also follow the same steps.