patch 8.2.4786: test for win_gotoid() in Visual mode fails on Mac

Problem:    Test for win_gotoid() in Visual mode fails on Mac.
Solution:   Skip the test on MacOS.

src/testdir/test_vim9_builtin.vim

@@ -4497,7 +4497,8 @@ enddef
 func Test_win_gotoid_in_mapping()
   CheckScreendump
 
-  if has('clipboard_working')
+  " requires a working clipboard and this doesn't work on MacOS
+  if has('clipboard_working') && !has('mac')
     let @* = 'foo'
     let lines =<< trim END
         set cmdheight=2

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4786,
 /**/
     4785,
 /**/