Mac
How do I force a Mac to start?
Press and hold the power button (Every Mac has a power button. On laptop computers that have Touch ID, press and hold Touch ID.) Then press and release the power button normally.
How do you reset an unresponsive Mac?
How to Force Restart Your Mac. Press and hold down the Command (⌘) and Control (Ctrl) keys along with the power button (or the Touch ID / Eject button, depending on the Mac model) until the screen goes blank and the machine restarts.
What do I do if my Mac screen is black and wont turn on?
How do I bring my Mac back to life?
Do one of the following: Choose Actions > Advanced > Revive Device, then click Revive. Control-click the selected DFU icon, then choose Advanced > Revive Device, then click Revive. Note: If you lose power to either Mac during this process, begin the revive process again.