lifestyle macbook back 10

Here's how to fix a Mac that doesn't start

Before we start, we have to ask you two questions. Have you tried restarting your computer? Did you check that it was well connected?

If so, then read on!

  1. Make sure your Mac turns on

Switching on and off are two terms often used interchangeably. Here, turning on refers to the fact that the computer starts up and starting refers to the launching of the operating system.

To verify that your Mac turns on, press the start button on your computer and listen carefully. If the fan turns on, your Mac is able to turn on (even if nothing appears on the screen). If there is no noise, no reaction, perform the following two actions:

  • Use another charger or power cable, your Mac may not turn on because its power cable no longer works.
  • Unplug external accessories, some printers and external hard drives (among others) may interfere with your computer.

If nothing happens, then go directly to step 8.

  1. Force restart

When your Mac is turned on but it doesn't seem to give any sign of life then force it to restart. Nothing could be simpler, just maintain press the ignition button for 10 seconds. You should hear a "click" that confirms that the power has been turned off. Wait at least another 10 seconds before turning on your computer again.

  1. Check the screen

If you are using an iMac, the problem may be with the screen and not with the computer itself. Apple has published a guide to the various problems that can arise with the display of your screen.

  1. Recovery mode

If your Mac starts up but the operating system does not launch then it may be from a damaged disk. To fix this problem, launch the disk utilities:

  • Force shutdown your computer by unplugging it or keeping its start button pressed.
  • Turn on your mac and press immediately (keeping pressed) the keys Ordered and R.Your Mac is then in recovery mode, which gives you access to disk utilities.
  • Click on the icon on your hard drive named Disk Utility then on Check the disc. If errors are detected then a message will appear asking if you want to restore them.

The recovery mode also gives you access to your Time Machine, allows you to reset your Mac and search for help online via Safari.

  1. Safe mode

Safe mode allows you to start a Mac despite its bugs and to fix them. It prevents your Apple computer from loading software at startup, it checks your disk and clears certain system caches.

To start Safe Mode, turn off your Mac, turn it back on, and immediately press Shift. A window opens, the option Start without extensions appears, connect your Mac.

  1. Check the file system

This tip is a bit more.

  • turn off your Mac and turn it back on while holding down the keys Cmd and S.
  • You can release these keys when the black screen (with messages written in white) appears.
  • Wait until the text finishes displaying, then type fsck-fy and press Return. Wait a few (long) minutes.
  • One of these messages appears on the screen: The volume -name of your mac- appears to be OK or FILE SYSTEM WAS MODIFIED.
  • If you find yourself facing the first message, then type reboot and press Return.
  • If you have the 2nd message, then type the command fsck-fy and press Return.

If you get the same result then go to the next step.

  1. Reset NVRAM memory

The NVRAM memory stores data that does not disappear even when the computer is turned off (volume, resolution of the screen, etc.). Resetting this data can sometimes be helpful, and it can't hurt your computer. To do this :

  • When restarting your computer, hold down Cmd, Option, P and R.
  • When you hear that the computer has restarted once, release the keys.

In some cases, resetting NVRAM allows your computer to restart normally. However, it may not be able to complete this command (the progress bar then stops midway).

  1. Reset SMC

One of the last steps before reinstalling your macOS is to reset the System Management Controller (SMC). This will help resolve problems with the battery or power supply.

On a portable macOS:

  • Connect your computer to an electrical outlet.
  • Press the keys simultaneously: Shift (right keyboard shift) + Control + Option (Alt) and the ignition button for 7 seconds.
  • Release.
  • Wait, then turn on your Mac.

For a desktop macOS:

  • Turn off your computer, unplug it.
  • Wait 15 seconds, then plug it back in.
  • Wait 5 seconds, then turn it on.
  1. Use target disk mode

This step should be done before reinstalling your macOS and it depends on your backup mode.

If you have already backed up the contents of your computer using your Time Machine, a Cloud or an external hard drive then you can skip to step 10.

If not, try to record as much data as you can, for that you will probably need another Mac. Here are the steps to follow:

  • Connect the two Macs using a Thunderbolt cable, if you have an older model, then use a FreWire.
  • shutdown your Mac (force your computer to shut down if necessary).
  • Turn it on while holding down the T key until the Thunderbolt icon appears on the screen.

Your computer is now in target disk mode, which means it acts as an external hard drive.

Normally you should see it appear in the Finder of the second Mac. You can import the files you want on the second Mac or even clone your entire drive and save it to an external hard drive.

  1. Reinstall macOS

You can reset your OS from disk utilities.

  • Force shutdown your computer by unplugging it or keeping its start button pressed.
  • Press the keys Cmd and R (and keep them pressed) all by restarting your computer.

Your Mac is then in recovery mode, which gives you access to disk utilities.

  • Click on Reset macOS.

For more details on this step, we advise you to consult Apple's tutorial.

  1. Make an appointment at the Genius Bar

If you have tried the different methods above but your computer refuses to turn on then it is time to make an appointment at the Genius Bar

. (tagsToTranslate) Repair your Mac (t) reset (t) Apple (t) Mac OS (t) Recovery mode (t) NVRAM (t) SMC (t) target disk mode (t) computers (t) table-of- happy