The ultimate Mac DIY repair guide: Get powered on and starting up
Macs are some of the most reliable computers you can buy, with useful apps like home office document scanner, so it can be a little frustrating when you press a button and nothing happens. But take a deep breath. There could be many reasons why your Mac won't start, but it's probably easy to fix. Apple has a support document with advice on what to do if your Mac won't start, but here's more information and a few things to check. So be sure to bookmark this page in case it comes up again as needed.
Before we begin, let this be a lesson in how to back up. Whether you use the cloud, store important files in iCloud Drive, or use Time Machine on an external drive, your most personal things (local documents, files, movies, music, etc.) are secure I want to delete it to So even if you have to erase your Mac and restart it,
Mac won't boot
Make sure it's really turned off. If you press the switch and nothing happens, it may already be on. It seems silly, but when your MacBook runs out of battery, it goes to sleep, making it hard to tell if it's actually working. Listen for fans (even fan-equipped Macs are pretty quiet when you're not doing anything) and check displays like the keyboard on a MacBook or the Touch Bar on a MacBook Pro. See also screen. If it's black, the screen is definitely off, but if it's a very dark gray or more color, not nearly black, but not quite black, it's on. You can adjust the contrast between the black frame and the MacBook or iMac screen. When it's off, it should blend perfectly. If you're using an external display, look at the power indicator on the front to make sure the cable is connected properly. Once you've confirmed that your Mac is indeed working and unresponsive, you can try the old miracle cure: reboot. See below if you don't know how to do this.
Check your connection
Next to the message "Are you connected?" question, there are often some obvious problems that can solve startup problems. Mac Power Cord. It can get loose, especially if you have a MacBook that you move around a lot. If you're using your MacBook Pro on your lap while charging, the Thunderbolt power adapter can go down a bit without you noticing. If not connected and the battery is damaged, see above. If you don't use an extension cord, your MacBook's power adapter can pull itself out of the outlet. Also, the PSU block may somehow separate from the spike module. This happened to me the other day when I put stuff in my cable box. If you have a desktop computer, you can take it apart when you move your desk.
If your Mac is connected to an outlet or UPS, make sure it's not turned off or disconnected. It seems silly to mention this, but there can be power outages and blown fuel that you won't notice during the day. If I'm typing this while my MacBook Pro isn't on, the only obvious sign in the room that I can see right away that the device is on is the LED on the TV, so the device is off until I'm watching TV. I don't know if you can check your ignition switch or fuel box. Also test the outlet itself with another outlet.