![]() This method is also called "zeroing data / drives". ![]() This add-on accomplish this by overwriting your files with zeros (0) before you delete them. If the issue continues or you need help with any of these instructions, contact Apple Support.Download Blank And Secure 7 - A application lightweight and portable allows you to completely erase your sensitive data without possibility to restore Blank And Secure:īlank And Secure is a application lightweight and portable allows you to completely erase your sensitive data without possibility to restore. If you're using an external display instead of a built-in display, make sure that the issue isn't with your external display. In that case, follow the steps for if your Mac doesn't turn on. If you can't start up from macOS Recovery, your Mac might not be turning on at all. If the issue returns after restarting, reinstall macOS. ![]() If Disk Utility finds errors and repairs them, restart your Mac. ![]() If Disk Utility finds no errors, reinstall macOS. For details, see How to repair a Mac disk with Disk Utility. Try to start up from macOS Recovery, then use Disk Utility in macOS Recovery to repair your startup disk. ![]() If your screen remains blank, press and hold the power button for about 10 seconds again to make sure that your Mac is turned off. Press and release the power button and see if your Mac starts up. Press and hold the power button on your Mac for about 10 seconds.* If your Mac is turned on, this turns it off. If your Mac appears to be stuck on a blank screen, follow these steps. A blank screen (black, gray, or blue) should appear once or more as your Mac starts up. ![]()
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