What is the reason why the Apple computer won t turn on?

The system is damaged, please reinstall the system

1. When the power is off, press and hold COMMAND

R button does not let go, press the power button again and let go, note that the commandr key cannot be released at this time. Until the language selection screen appears.

2. Select the system language that will be installed, and click "" to continue.

HD, select the Erase tab at the top of the center.

Then click on "Erase" in the bottom right corner....”。

5. Close the window above and select [Reinstall OS].

x], click "Continue", and needless to say, select terms such as "Agree". Just follow the prompts.

Restart the permission to repair the disk.

Restart the Repair Disk permissions, open Applications-Utilities-Disk Utility, select the name of the system hard disk on the left, and then see the first aid option on the right, a Repair Disk permission, click on it.

It's also available in the taskbar. How to open: There is a lower apple icon in the upper left corner of the screen, and after clicking it, the system preferences will come out inside; There is a gear icon in the taskbar below, and clicking on it will also take you to System Preferences.

As long as the MacBook (Pro) on the market can be installed with Windows system, but it is installed with dual systems, and Apple's original system cannot be uninstalled. And when you install windows, you must install antivirus software, because there is no difference between the Apple computer and other computers with windows, I use Apple's notebook, I don't install windows because the Apple system is almost not poisoned, and the speed is very fast, whether it is turned on, shut down, or running.

Hello dear, glad to answer for you! Here I will help you find out that the Apple computer can't open the software should be the following steps: 1. Please open the "System Preferences" app first. 2. Then click on the "Security & Privacy" option in the system settings window.

3. Then, in the general settings of security and privacy, you can see that the system only allows the "Mac App Store and Approved Developers" option by default, that is, other applications will be blocked from opening by the system. But then we can see a "still open" button, click on it. 4. If you still can't open the app at this time, please click the "OK" button to continue.

5. At this time, we return to the "Security & Privacy" setting window and click the "Lock" button in the lower left corner. 6. Then enter your login password to unlock the security settings. 7. When the security lock of the system is unlocked, then click on the "Any**" option, and then click on the "Allow from Any**" button.

8. Then we click on the application that we can't open before, and then click the "Open" button. The solution to the Mac computer can't open the application is shared here, although the steps are a bit many, but after operating the settings step by step, the problem can be easily fixed.

Hello, method.

Method 1. When installing Mac apps, most users often encounter the prompt "Corrupted and won't open." You should move it to the Trash" or "Can't open because it's from an unidentified developer" When you encounter this situation, the solution is simple and the steps are as follows:

1.Open the System Preferences screen and go to Security & Privacy.

2.Tap the lock icon in the bottom left corner to unlock the change permission.

1. Open the terminal (

2. Copy and paste sudo spctl --master-disable, and press enter.

3. Enter your account password and press the enter key to confirm the execution (the password will not be displayed, just enter it directly).

Method two. For example, when installing an app, "I can't open because it's from an unidentified developer" appears and prompts your software to display the disk image at what location and at what time.

In this case, here's how:

1. After putting the software into the "application", click the software right-click - open, 2. After the following dialog box pops up, you can open it.

Later, in the general settings of Security & Privacy, you can see that the system only allows the "Mac App Store and Approved Developers" option by default, which means that other applications will be blocked from opening by the system. But then we can see a "still open" button, click on it.

If you still can't open the app, click the "OK" button to continue.

Then we click on the application that we couldn't open before, and then click on the "Open" button.

After the above operation, you can open other applications. However, for the sake of security, it is recommended that you still pay attention to security when applying online, and do not open it on the system at will.

It is possible that when you are prompted with a message saying "Because it came from an unidentified developer", open the System Preferences app and click on the Security & Privacy option in the system settings window.

Later, in the general settings of Security & Privacy, you can see that the system only allows the "Mac App Store and Approved Developers" option by default, which means that other applications will be blocked from opening by the system. But then we can see a "still open" button, click on it.

If you still can't open the app, click the "OK" button to continue.

At this point, we go back to the "Security & Privacy" settings window and click on the "Lock" button in the bottom left corner.

Then we click on the application that we couldn't open before, and then click on the "Open" button.

If these methods don't work, you have to find an Apple after-sales maintenance center to let professional maintenance personnel carry out inspection and maintenance.

Check the power connection to make sure that the power cord is not damaged and that it is securely plugged into your Mac and a working power outlet. If your Mac doesn't have a built-in display, make sure your external display is connected to a power source and your Mac is turned on. Press and hold the power button on your Mac for about 10 seconds.

The reasons why the Apple computer laptop can't turn on are as follows: it may be a software conflict, and the installed software does not match the computer's system, which may also cause the computer to not turn on. The memory is broken or the memory slot is soldered, and then there is a problem with the power supply chip of the motherboard.

Confirm whether the power supply is connected: If the computer does not respond, first check whether the power supply is connected and whether the power supply is normal. Check if the LED light on your computer is normal. If that doesn't happen, try a different power cord or outlet and make sure the power switch is pressed.

Try to enter safe mode: Turn off your MacBook. Press the power button. As soon as you hear the startup sound, hold down the shift key. When you see the gray Apple icon and the progress indicator (which looks like a spinning gear), release the shift key.