The fan works like a crazy and super fast drain battery after installation of Sierra

I installed Sierra on my MacBook Pro, the fan works like crazy and the battery is empty after about 1.5 hours. Which never happened before. I'm only using Safari and Mail in the moment. I talked to Apple Support and they suggested to reset the SMC, but this brought no improvements. What can I do else? Again, I plan to install the El captain...

I had this problem just after I installed Sierra on my MacBook Air.  First I tried to reset the SMC and the LANDAU.  This does not prevent fans constantly in the course of execution.  I then used the activity monitor to see what was possibly strain my system.  I noticed the "DCs" process was always sucking up to more than 90% of my CPU usage.  However, others said that it is normal after an upgrade of the OS and it should fall back down once the computer finishes its initial picture and analysis of the files.  So I run my MBA plugged nonstop for 36 hours in a row and the fans just kept running so that the process of "DCs" continued to drain at > 90% of CPU usage.  I also looked carefully at the activity monitor and saw that tasks such as analysis of photos had their own separate process "DCs".  So I dug further into what the devil "DCs" was really do with a lot of CPU resources.  Long story short, I found that there is some glitch in Sierra which causes the macOS stuck on a process involving the keychain and iCloud.

That's what I did to fix this keychain/iCloud which led to "DCs" fans of triggering and overloading the CPU to be always on:

-In the activity monitor, I used Force Quit to kill the process that involved the keychain

-In the activity monitor, I then Force Quit the process that involved icloud

-In activity monitor, I finally Force closed the process "DCs". (I found that I could not simply force quit 'DCs' without first allowing the keychain & iCloud first)

-After all, I restarted the computer and fans were finally off the coast!  I open the activity monitor and saw that 'DCs' has is no longer hogging up the CPU usage.  Photoanalysis process were still running in the background at 40-50% CPU use with no trigger unwanted system fans.  the iCloud synchronization and my keychain also worked very well.

I'm finally able to use Sierra without my fans blazing out of control.  It took me a while to get this sorted out.  Hope this helps to save you a few headaches and time until Apple can get counts that there is this Sierra software glitch they need to address.

Tags: Notebooks

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