Choose Disk Utility from your Recovery options and click the First Aid option to check your startup disk for errors. If you have an Apple silicon Mac, press and hold the power button, then choose Options and click Continue. To fix this problem, enter the macOS Recovery system by holding Cmd + R at boot time on an Intel-based Mac. Either the disk is physically damaged or your Mac is having trouble locating its macOS operating system software. If you spot a folder with a flashing question mark displayed on the screen when your Mac is booting, there could be something wrong with the startup disk. Resetting individual RAM modules could fix this, provided you’re able to freely access the RAM modules, which isn’t easy on newer machines.
If you hear loud tones during startup, the RAM has failed to pass an integrity check. With a diagnostics check finished, you’ll see whether the battery, processor, or something else is malfunctioning. Hold down D while turning on the machine to access and use Apple’s diagnostics tests. If the problem you’re having is rooted in a failing logic board, you’ll need to pay for a physical Mac repair.Ī flashing power or MagSafe LED means dodgy internal hardware-use Apple’s built-in hardware diagnostics to identify the culprit. Your Mac’s power button might be broken instead, so double-check it. Then rule out any power problems in your home by resetting a power breaker or GFI outlet. Verify whether your power adapter and cable work on another Mac. To see if you perhaps need a new battery, check your Mac’s battery’s cycle count. Resetting the NVRAM, PRAM, and SMC could also easily fix your charging problems.
If macOS won’t boot, hold the power button until the screen goes blank, then let go and press the button again.
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