How to Fix My Mac won't wake from Sleep - How to disable hibernation mode - works in Sierra OS X 10.12

How to disable hibernation mode

Code:

sudo pmset -a hibernatemode 0

delete /private/var/vm/sleepimage :

Code:

sudo rm /private/var/vm/sleepimage

create an empty file and name it 'sleepimage'

Code:

sudo touch /private/var/vm/sleepimage

change this flag to immuable

Code:

sudo chflags uchg /private/var/vm/sleepimage

Now, OS X won't be able to rebuilt over your sleepimage file since it is locked.

How to re-nable the default settings 

First, you need to restore the sleep image to its original state 

Code:

sudo chflags nouchg /var/vm/sleepimage
sudo chown root:wheel /var/vm/sleepimage
sudo chmod 1600 /var/vm/sleepimage

To verify, when you type this command:

Code:

ls -lOh /var/vm/sleepimage

You should get this result:

Code:

-rw------T  1 root  wheel  -  4.0G Aug 23 15:01 /var/vm/sleepimage

Then you need to reset the hibernation mode to its system default:

Code:

sudo pmset -a hibernatemode 3

You may have to reboot.