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When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
My device is not receiving an update
MacBook Air
First, you need clearly identify the exact model of your Mac? Your text refers to a Mid 2009 MacBook, your tag refers to a MacBook Air, and you've posted to the forum area for 12" Retina MacBooks. Three different Mac models.
What do you actually have?
The latest macOS version a mid 2009 MacBook can run Is macOS X 10.11.6, El Capitan. Your MacBook is too old to update any further
MacBook (13-inch, Mid 2009)
