How safe is Force Restart [Control-Command-Power Button] keyboard shortcut?
Force restart is not safe mode of operation.

What happens is the power to the system is simply just cut off.

There is no soft landing in here, no flush buffers, umounts filesystems ect.. just brute force pull the plug.

You might want to consider following shortcuts in order before forcing it.


Hold down the power button for 1.5 seconds -    Show the restart / sleep
/ shutdown dialog in OS X Mavericks
Hold down the power button for 5 seconds    -Force the Mac to power off
Command-Control-power button    -Force the Mac to restart


As said, it is not safe mode, so frequent use can lead to multitude of problems. It is not possible to exactly specify what can happen, but results could be as bad as damage to the computer, mostly to the hard drive.