I asked this question a while back: Stop MacBook from using up the battery while it is in sleep mode. And never got to the bottom of it.
I keeps happening, that I put my Mac in sleep (on a full battery), and bring it with me on a train or something – and on that day, the battery-Gods had thrown a curse on me: 10% battery left. SIGH!!
Overarching question: In order to debug this, I'm looking for a way I can figure out, which applications used (the most) energy for the past 12 hours (or so).
I know that it can be misleading, since maybe Chrome spend the most energy/battery, but it was my Docker-service that stopped my Mac from every sleeping (while barely consuming any energy/battery).
Bonus points if you can give me a terminal-command to run for: ‘Kill everything that is stopping my Mac from going into proper sleep'.
Solution attempt 1: Activity Monitor
I can see that there are some information in the Activity Monitor. Such as the column called:
12 hour Power. I assume that is what I'm looking for.
It told me that ‘Spotlight' consumed 73% (in the
12 hour Power-column), the last time this happened. Hmm…
Solution attempt 2: 3rd party application – or a command
I tried looking for a program or a terminal-command, that would get me some extra insight. But I couldn't find anything (that didn't look shady).
Solution attempt 3: Lock screen vs sleep vs hibernate
I read this article here: How to Choose a Sleep Mode for Your Mac, which was good for my understanding, but not revolutionizing anything in my quest here.
The biggest difference after that article was, that I know more about when to use ‘Screen lock':
… and when to use ‘Sleep':
For context, I'm mentioning that I'm using
Solution attempt 4: Look into
pmset -g I got some extra info. But nothing that I could use for this particular case:
System-wide power settings: Currently in use: lidwake 1 lowpowermode 0 standbydelayhigh 86400 standbydelaylow 10800 standby 1 proximitywake 1 ttyskeepawake 1 hibernatemode 3 powernap 0 gpuswitch 2 hibernatefile /var/vm/sleepimage highstandbythreshold 50 displaysleep 15 womp 1 networkoversleep 0 sleep 0 (sleep prevented by nfsd, sharingd, useractivityd) tcpkeepalive 1 halfdim 1 acwake 0 disksleep 0
As can be seen there, it says:
(sleep prevented by nfsd, sharingd, useractivityd).
I don't know what this is. But it disappears by itself, if I simply run
pmset -g again and again.
This I know quite a bit about, since when I played with Vagrant. It's the Network File System Daemon. One can read more about it with the command:
I stopped that with:
sudo nfsd stop (it can be started simply with a reboot or with:
sudo nfsd start). It's what handles sync'ing of files to a Vagrant Virtual machine – and maybe also to a Docker container (I'm assuming the last bit here).
After having gone through this, then
pmset -g doesn't display any programs nor daemons ‘preventing sleep'.
So now I'll try, if I know that battery will be important, to run
pmset -g and see if any service is preventing sleep (and also checking that column in the Activity Monitor). And trying to kill those applications first.
But I would still love to get some graphs over which applications used how much energy/battery, of the past X hours.