The screen is dull grey or black and seems to be off. Some users got nerved when Mac failed to start after the Sierra installation. Mac Fails to Start After the Sierra Installation However, if restarting your Mac still won’t work, launch your Mac in safe mode try updating to Sierra in App Store while still in the Safe Mode.Alternatively, you can hold Command+R to enter the Recovery Mode and restart the installation.
#Mac os sierra compatibility issues how to
Check more details: How to Prepare Your Mac for macOS Sierra Upgrade.įirst press Command+L to check if the installation is under progress, if yes, wait for the installation to continue if not, restart your Mac since the installation can rebuild itself and continue to progress on its own. First of all, back up your Mac, then clean up your Mac before the installation make sure the space available on your Mac drive should be no less than 15G. If no files are being installed, turn your Mac off by holding the power button, restart the Mac to see if the progress bar updates again.īut if the upgrade hasn’t started yet, that means your Mac is not prepared for macOS Sierra upgrade, you need do some preliminary work to improve such a problem. But if you have waited for a quite while and there is no moving on the progress bar, press Command+L to see what’s going on there.
If you have already started the upgrade, you have only to wait. This is the most common issue that happens during upgrading your OS to Sierra version mainly for the reason the installer size is 4.77G.
Mac Hardware Issues (Erratic Functionality).