What does this barred anki-2.1.35-mac logo mean?

[SvenAERTS228]

does it mean this version is not compatible with my OSX 10.11.6 ?
I can’t upgrade my Macbook pro late 2009 any further if I’m not mistaken.
Thy & greetings from Brussels

[dae]

That sounds like you clicked on the button that says “for Mac OS X 10.13.4+”