Will my data on the Macbook Pro be destroyed if I upgrade to macOS Sierra from OS X El Capitan?
1 Answer
It will most likely all be there. It will only update the operating system and leave your data untouched. It is still a good idea to make a backup in case something goes wrong.
-
3Provided it goes well. It's always a good idea to have a backup of your files before upgrading anything.– LizzanOct 26, 2016 at 9:02