How can I reinstall Mac OS on my 2009 Mac book pro ?
How can I reinstall Mac OS on my 2009 Mac book pro?
MacBook Pro 17″, OS X 10.11
How can I reinstall Mac OS on my 2009 Mac book pro?
MacBook Pro 17″, OS X 10.11
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How to reinstall macOS - Apple Support
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Did you already check this article?
How to reinstall macOS - Apple Support
The file for the download can be found via this article, opened in Safari:
How can I reinstall Mac OS on my 2009 Mac book pro ?