doc: preannounce dropping macOS 10.10 support

Updates #23011

Change-Id: I0eccea5d08a8758585f183540787b78fb80aa36a
Reviewed-on: https://go-review.googlesource.com/c/151360
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

diff --git a/doc/go1.12.html b/doc/go1.12.html
index 79f8eceb47e725f2821ff71c6ccafec5c3e32c44..d2aa2f6cdaddd81b892efe4624fde851bad64945 100644 (file)
--- a/doc/go1.12.html
+++ b/doc/go1.12.html
@@ -47,6 +47,11 @@ Do not send CLs removing the interior tags from such phrases.
   12.0+.
 </p>
 
+<p id="darwin">
+Go 1.12 is the last release that will run on macOS 10.10 Yosemite.
+Go 1.13 will require macOS 10.11 El Capitan or later.
+</p>
+
 <h2 id="tools">Tools</h2>
 
 <h3 id="gocache">Build cache requirement</h3>