How do I upgrade 15" Macbook Pro late 2011from X Yosemite 10.10.5 to X 10.11 El capitan

You log into the Mac App Store with an Apple ID previously used to download El Capitan, or skip it and get High Sierra instead.

Kappy: That list is for Mojave. It isn’t applicable to people who are trying to upgrade to El Capitan or High Sierra.

(164685)

See Upgrading to El Capitan or Later

1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later

2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later

3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later

4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later

5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later

6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later

7. Xserve (Early 2009) - Model Identifier 3,1 or later

How to download macOS High Sierra

Neil,

Fixed. Selected the wrong list. Spent too much time in Canada this year, and just got back home. I'm old and tired.