how to reset pram on high sierra macbook air

The screen goes black, and your Mac reboots. (Once the install is complete and your Mac restarts, it may fail to complete the reboot process.)

At this point, you’ve selected the target drive for the Sierra install, agreed to the licensing, and your Mac was displaying a progress bar with an estimate for time remaining. There are two common freezing issues one can occur during the install process, the other when your Mac reboots after the install is complete.įreezes After Restart: Let’s start with the easier of the two issues to fix: when your Mac seems to stall during the final reboot of the installation. Not to worry we’ll show you how to resolve it. In fact, the vast majority of users upgrading to macOS Sierra won’t have these problems.īut if you do experience an issue after upgrading, it’s probably going to be one of the issues we mention here.

Now, we’re not saying you can expect to experience all or even any of the issues we outline here. It seems every version of Mac operating systems that you install may have a few issues that pop up.

How to reset pram on high sierra macbook air