There are various start buttons for reinstalling Mac OS

by Devin Yang
(This article was automatically translated.)

Published - 7 years ago ( Updated - 7 years ago )

Apple official website document reference:
https://support.apple.com/zh-tw/HT204904

There are various startup buttons for reinstalling Mac OS, please refer to the link above for instructions.
If you want to clear the data and reinstall, after many tests, I think there will be no problem using Command+Alt+R .
During the process, the space should be cleared first, otherwise the previously installed software will still be on it.

Note: Do not look for me if the reinstallation fails, this article is for reference only .

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Devin Yang

Feel free to ask me, if you don't get it.:)

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