Command to check ModelIdentifier of your Mac:

system_profiler -detailLevel mini | grep "Model Identifier:"

 

Command to change directory to Resources:

cd /System/Library/Extensions/IOPlatformPluginFamily.kext/Contents/PlugIns/ACPI_SMC_PlatformPlugin.kext/Contents/Resources/

 

Command to list the names of ModelIdentifier in Resources directory of your Mac:

ls

 

Command to move YourModelIdentifier.plist file to Users directory:

sudo mv YourModelIdentifier.plist /users

[Please Replace YourModelIdentifier.plist with Your Model Identifier.plist  name. Like mine was MacBookPro8_2.plist. In My Case the command will be: sudo mv MacBookPro8_2.plist /users]

 

Please keep YourModelIdentifier.plist file SAFE as you may need it if Kernel_Task memory problem appears again.

 

That's It, Restart your Mac and you are done.