outdoneuni Said:
"Macbook wont sleep, Cant do the forced shutdown, Mac consuming battery overnight. Please help: High cpu usage is mostly done by Notes, Mail app, web whatsapp others are system process like; kernel_task, coreaudiod, WindowServer, audioanalyticsd, airportd. […]I did fresh re-install os but the problem still persists. No idea if apple wants me to upgrade the machine :)”
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Is this Covered Under AppleCare?
A. Get this Serviced:
Take this in for a Genius Bar Appointment at your local Apple Store. Bring a proof of purchase with you. There, it would be diagnosed, and you'd be provided with your options. Back Up your Mac First: Be certain you Create a Time Machine Backup of your Mac, so that way you can have something to restore your Mac from, should anything go wrong with the service.
B. Contact these Developers:
Find the Developers’ Contact Us into in the App Store, or in their own Web site. Inform them of what is going on, and ask them if they are aware of this and what fixes they may recommend, including a new install of the software, backing up your files, first.
C. Always have a Backup:
Backing up would most certainly be wise. It can be from your entire computer (through use of Migration Assistant), or just certain items(through use of external storage). And you should do so every so often, particularly before and after installing updates and new software.
D. Backup > Restore > The Migrate:
So, did you create a Time Machine Backup prior to all of this? If so, you may want to backup your Mac, and then restore from that backup. Then, use Migration Assistant to migrate your items into it. Another option would be the back it up and then reset this to factory settings, using Migration Assistant in the same fashion.