![]() (I’ve seen someone recommend that you reset the PRAM three times before booting in the single-user mode. ![]() If you did it right, you should see a whole bunch of lines on the screen in what is a Terminal-like interface. That’s done by pressing the Command and S keys at the same time, right after pressing the power key. Next, you have to boot your Mac in single-user mode. Pressing the power key for a couple of seconds will do the trick. First, you need to shut down your Mac, if it’s powered on. You can try to reboot or reset the PRAM and SMC - the first things that Mac users can try when something isn’t working right - but that will not fix it. It is not clear what exactly is causing macOS to act up after installing an update, but it rears its ugly head after powering on the Mac. Apple has not addressed it yet, but, don’t panic: it is pretty easy to fix it yourself. As it turns out, this problem predates Sierra by a couple of years. I initially blamed the update for this, but after I saw no similar reports from other users I started doing some digging. However, the update to macOS Sierra 10.12.2 ruined its streak, leaving me with a blank screen that only displayed the cursor. It was totally reliable, even after I accidentally spilled coffee on it. ![]() ![]() In the three years of using my MacBook Air, I have never had any major problems with it. Your link solution was the one that worked. I tried the PRAM many times and it didn't work. ![]()
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