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Aporte original por: Dan ,


It sounds like you are facing a few different issues here. The first is the battery may need replacement the second is you have a sensor which is preventing the system from working at full clocking. SMC will put the system in CPU Safe Mode when it senses a thermal or voltage problem.

Lets run diagnostics. Restart your system holding the '''D''' key do you get an error message with an error code let us know what you discover.

To check the battery install this gem of an app [|CoconutBattery] take a snapshot of the main window and post it here for us to see [guide|21499]