![]() If you have a desktop Mac, unplug the power cord and wait for 15 seconds. There are several different ways to do this, depending on the type of Mac you have. Resetting the SMC is a powerful tool that can correct a number of different problems. The SMC, or System Management Controller, controls many of your Mac’s functions, including its ability to wake up when you open the lid. If all else fails, you can use this menu to restore your Mac to a previous version from a Time Machine backup. If this doesn’t work, you can also try Internet Recovery Mode, which you can access by pressing and holding the Option + Command + R keys right after pressing the Power button. This will automatically scan for potential problems and repair anything it finds. Right-click the drive and choose Run First Aid. The first step should be to use Disk Utility to scan your hard drive. This gives you the option to restore from a Time Machine backup, reinstall macOS, get help online, or use the Disk Utility. The machine will continue to boot until a macOS Utilities menu appears. Wait until the Apple logo appears on the screen and then release the keys. Press the Power button and then press and hold Command and R. This partition can boot independently of the rest of the machine, so even if a virus or something else has rendered the majority of your hard drive useless, Recovery Mode can help. Boot to RecoveryĪll Macs have a built-in recovery partition that provides access to tools that can help repair a variety of different problems. If the test returns no issues, then it means your hardware is most likely fine. Still, others will provide reference codes that you can look up to glean more details about the problem. Once the tests are complete, the screen will display the results.ĭepending on the issue, your computer might suggest a fix or give you the option to try the test again. This can take a bit of time to complete, so don’t worry if it isn’t done right away. ![]() ![]() After you choose a language, Apple Diagnostics will begin running a series of tests that check the hardware in your system.
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