Occasionally, you may experience a Mac glitch called the “White Screen of Death”. This occurs when you boot your Mac, and it comes to a white screen. There is no Apple logo and the Mac does not boot up all the way. The “White Screen of Death” occurs most frequently after a macOS upgrade, but there can be other causes. This article lists several troubleshooting steps to recover from this issue. You may not be having this problem now, but you should read the article for future reference.