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Why does my MacBook pro only work when plugged in?
A common cause of this problem is due to leaving your computer plugged in a lot of the time. This can cause the System Management Controller (SMC) to believe the power level is below a set threshold resulting in it triggering the computer to go into deep sleep mode and shutting off when unplugged.
Why will my MacBook Air charging but not turn on?
Ensure your Mac is plugged into a power source. Try swapping out the charger or power cable, or using a different power outlet. The charger itself may be damaged. If you’re using a MacBook and its battery is completely dead, you may need to wait a few moments after plugging it in before turning it on.
How do I find my username and password on my Mac?
If you can’t remember your account name, open a Finder window, then choose Go > Home. Your account name appears next to the house icon at the top of the Finder window.
How do I clean the charging port on my MacBook?
Use a small amount of 99\% isopropyl alcohol to clean your USB-C port. The best way to apply isopropyl alcohol to your USB-C port is to dampen a small piece of cotton with it. Then insert that cotton and move it around using a toothpick. This allows you to wipe up the dirt inside your port before the alcohol evaporates.
Why isn’t my Mac charging when plugged in?
This could be the result of a faulty power cable, corrupt system settings, or even some dirt in your charging port. Your MacBook battery might not charge even when using the power adapter as a power source.
How do I force my MacBook Air to start up?
Press and hold down the Command (⌘) and Control (Ctrl) keys along with the power button (or the Touch ID / Eject button, depending on the Mac model) until the screen goes blank and the machine restarts.
How do I reset my macbook without password?
Boot into Recovery Mode by holding Cmd + R when you’re powering on the machine. At the menu that you will see, go to Disk Utility, select the lowest hard drive partition you can see, then click Erase.