It also plays a role in the behavior of your hard drive, how your computer behaves in sleep mode, and the power supply. From Finder, hit Command+Shift+G and enter the following path: ~/Library/Caches/com.apple. Locate the following keys on the keyboard: Command, Option, P, and R. SMC is a chip in your Mac that’s involved in running a lot of the physical parts of the machine, like LED indicators, keyboards, cooling fans, power buttons, and other peripherals.Reboot the Mac into safe mode by restarting and immediately holding down the “Shift” key.Additional tip: Speed up Safari for MacĪn extra tip for speeding up Safari when it runs slow: After your Mac shuts down, press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. Resetting PRAM is safe for your computer and will not delete your files. Step 1 SMC Reset for Mac Laptops with a Non-Removable Battery If your Mac has a removable battery, skip this step and go to step 2. Doing a SMC reset is safe for your computer, it does not delete any of your data. No, resetting the SMC does not delete your files. Your Mac should not turn on, if it does, you will need to do this again. On the keyboard, press and hold the Shift, Option, and Control keys on the LEFT side of the keyboard, and at the same time press the power button.Plug the system back in and start normally. Make sure the Mac is plugged in to AC power. On iMacs, Mac Pros, Mac Minis, disconnect the power cord then press and hold down the power button for 5 seconds.You may need to check things like the startup disk, display settings, and date/time panes of System Preferences to make sure they’re set the way you want them. Let go of the keys and allow your Mac to continue starting normally.Keep holding down those keys until you hear a second startup chime.For Intel-based Xserve computers that aren't responding, you can shut down locally or by using. Wait 5 seconds, then press the power button again to turn on your Mac. After your Mac shuts down, unplug the power cord. Press the power button, and as soon as you hear the startup chime, hold down Command-Option-P-R. Follow these steps for iMac, Mac mini, Mac Pro, and Xserve.To reset your NVRAM, you use exactly the same procedure you once used to reset PRAM: Mac notebooks that have non-removable batteries include MacBook Pro (Early 2009 and later), all models of MacBook Air, MacBook (Late 2009), and MacBook (Retina, 12-inch, Early 2015 and later). Most older Mac notebooks have removable batteries. The guide below is based on using my own Macbook Pro Retina 2013, your computer may vary. To reset the SMC on a Mac notebook, first determine whether the battery is removable. Whenever you upgrade your MacOS, you should perform resets of NVRAM (formerly PRAM) and SMC to get the full power of the upgrade and clean out old files and settings that will otherwise slow your Mac down.
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