Go to Apple > App Store and click Updates to check for, and then download, new versions of software from the App store (including OS X itself). Update your software: If your problem is a bug, a software update may help.If force-quitting and restarting doesn’t stop your slowdown problems, you might need to do more: If your Mac still won’t start, take it to the Genius Bar.Trying resetting your Mac’s SMC (System Management Controller).Did you recently install new RAM? Take it out.Do you have another power cable (or, for laptops, another power adapter)? Try that.Is your power cord damaged? Check for chew marks if you have a kitten, puppy, or other teething beast.Does the electrical outlet work? Plug in a lamp to test it.Are you staring blankly at this chapter because you can’t even get your Mac to turn on? Try this:
