If there are problems with the Mac startup process or a MacOSThe operating system macOS , previously Mac OS X and OS X , is the operating system from the Californian hardware and software company Apple for laptop and desktop computers of the Mac series. https://de.wikipedia.org/wiki/MacOS update cannot be installed, the following has often helped us:
Use secure mode
- Turn on your Mac or restart it, then immediately press and hold the Shift key while the Mac starts up.
- Release the button when the login window appears and then log in to your Mac.
- You may be asked to log in again. Either in the first or second login window, “Secure system start” should be displayed in the top right-hand corner of the window.
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