MacOS Sierra How to upgrade?
First, back up our information:
Computer Backup method is more, you can choose the most traditional method, the important files directly copied to the mobile hard disk or USB disk, or use the time Machine backup function provided by Apple, a full backup of the computer, you can use ICloud or other cloud services for backup.
MacOS Sierra
Second, MacOS Sierra Upgrade Method:
Similar to upgrading IOS 10, we can choose to upgrade the system automatically so that all the data in your computer will be saved. Of course, regardless of the method, we'd better have a full backup of the computer, after the IOS 10 upgrade when the problem of black screen, I believe many people already understand the importance of backup. After the backup is complete, the new system is upgraded. If you want to upgrade directly, open the Mac app Store, you should be able to see the new system on the homepage of the download page, while the system update will also remind you of a new system upgrade, click to download, download completed after the program will automatically run the upgrade operation, you just have to wait patiently.