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Click on this if you use a computer.
Click on this if your computer runs on Mac OS.
Click on this if you use a smartphone, tablet or another type of mobile device.
Click on this if your computer runs on Windows OS.
Click on this if your mobile device runs on Android OS (e.g. Samsung, LG, Sony, HTC, etc).
Click on this if your mobile device runs on iOS (iPhone, iPad and iPod touch devices).
Solutions are displayed which match your selected specification «Mac OS».
Make sure you selected all specifications which apply to you.
Press the POWER button. Once you hear the start up tone, press and hold the SHIFT key and until the grey Apple icon is displayed and the progress indicator appears.
To leave safe mode, restart the computer.
If you still aren't sure how to access safe mode, watch this video:
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