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Shine the flashlight through the Apple logo on the back of your screen. The trick works because your login screen is still there, but you can’t see it. There is a fairly simple solution to it, though, quite an odd one - involving a flashlight or a lamp.

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The problem appears to be somehow concerned with the battery power circuit with Mac failing to light up the screen. This is typically followed by a recurring “Reset Password” message. The common issue reported on many Apple forums is Mac’s screen going black on startup.

Release the keys after the second startup sound or when the Apple logo shows up.Ĥ.

Startup your Mac and press and hold Option, Command, P, and R keys.

If you experience issues with booting your Mac, try resetting NVRAM. NVRAM is a small amount of memory on your Mac that contains certain settings, such as sound volume, display resolution, kernel panic information, and your startup disk selection.

Check 'Run Maintenance Scripts' and 'Repair Disk Permissions.'.

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Launch CleanMyMac (you can get its free version here).

I've been using CleanMyMac X for some years now because of its Maintenance tool, which can help fix performance issues on your Mac. While in safe mode, you might try running a couple of maintenance utilities. At this point, you at least have some freedom of action to investigate and troubleshoot the issue.

Press the Shift key and click Continue in Safe Mode.ĭid your Mac wake up? Congrats, you’re in safe mode.

Press and hold the power button until the startup options window shows up.

To start up your Mac computer with Apple silicon in safe mode:

Release the Shift key after the login window shows up.

Restart your Mac and press the Shift key.

Shut down your Mac and wait 10 seconds.

To start up your Intel-based Mac in safe mode: Sometimes it’s the single most effective solution when your Mac won’t turn on or continuously crashes.

The safe mode limits the macOS to its most basic functions while allowing you to recover your Mac. MacBook won’t boot? Start it in safe mode To solve the issue, uninstall the unwanted app with CleanMyMac X (or a similar app) while in safe mode.Ģ. Sometimes your Macbook wouldn’t start because of a broken application that affects the startup, quite possibly, antivirus software. If it glows, then your display is probably off. Could it be the display? Press the Caps Lock to see if it lights on.Does your Mac make any noise? If the fans are working, but you can’t hear any other sounds, this might indicate logic board failure.To isolate the source of the problem, look into the following: Also, check the AC power socket is working.

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Check your charger’s cableĬarefully examine the cable along its full length to see if the charger is intact and all connections are in place. Here are six simple tips to try if your MacBook doesn't turn on. If it’s not the case, you are welcome to try some of the following easy tips. Your first guess should be your Mac has run out of battery. Before you read next, check if your Mac is plugged in. You still have pretty good chances of fixing it, even without a technician’s help. When your Mac won't load or hangs on startup, it’s not the end of the world. Now, let’s dive into more ideas and solutions. You may also find and delete system junk that often causes app conflicts. If you want a script to run on login for all users, I believe LoginHook is your only option, and that's probably the reason it exists.Download a free version of CleanMyMac to review your login items and background apps. System-specific launch daemons (placed in /Library/LaunchDaemons) are run on boot. The key is that this is a User-specific launchd entry, so it will be run on login for the given user. Tail /var/log/system.log for error messages. Run launchctl load ~/Library/LaunchAgents/ and log out/in to test (or to test directly, run launchctl start )

Replace the after the Program key with your desired command (note that any script referenced by that command must be executable: chmod a+x /path/to/executable/script.sh to ensure it is for all users). Updated 5 for OSX El Capitan and newer (credit to José Messias Jr): Here's the specific plist file to run a script at login. Log in (or run manually via launchctl load )įor more on launchd, the wikipedia article is quite good and describes the system and its advantages over other older systems.plist file according to the instructions in the Apple Dev docs here or more detail below. You can run once or keep alive as a daemon. You'll have full control over all aspects of the script.

Tl dr: use OSX's native process launcher and manager, launchd.

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