Your system will try to go to sleep mode more aggressively when its on battery. Your SMC will do this more so with an old battery! So keep that in mind! Try to keep your system powered to reduce the risk.
You can alter your Energy settings clicking on the battery icon in your menu bar
There are a few apps which can help prevent your system from going into sleep mode in the middle of your DJ gig: like Jolt of Caffeine
I think I found your issue!
I noted your TG Pro output offered something my system doesn't show! As it turns out I also have a 2012 15" MacBook Pro 2.7 GHz system which I use answering peoples Q here. Your output shows 'Platform Controller Die' where mine does not, as you can see here:
So I went back to double check your model info to make sure you had a 2012 system taking note what CoconutBattery tells us. Then to make sure I wasn’t seeing things I also ran CoconutBattery on my system. As it turns out I had recently replaced my battery. Then it hit me! Your battery while showing it still has 83% of life left the batteries mAh values are much lower than they should be! Here’s mine and yours side by side:
Don’t focus on the design cap as that is just the battery has been programed with. Yours is trying to imply its better than it is, and in my case the battery value is lower than what the battery is really offering!
Where did you get this battery?
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@sonah_t - I would strongly recommend you check your battery. Your systems age is telling me it likely needs a new battery given your symptoms.
Let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Aggiungere immagini ad una domanda
da Dan
Ok I did it. Thank you Dan.
da Thanos Moraitis