What to do when your Mac displays a blank screen and the cursor after a macOS update

In the three years of using my MacBook Air, I have never had any major problems with it. It was totally reliable, even after I accidentally spilled coffee on it. However, the update to macOS Sierra 10.12.2 ruined its streak, leaving me with a blank screen that only displayed the cursor. I initially blamed the update for this, but after I saw no similar reports from other users I started doing some digging. As it turns out, this problem predates Sierra by a couple of years. Apple has not addressed it yet, but, don't panic: it is pretty easy to fix it… [Continue Reading]