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.
diff --git a/src/testdir/test_vim9_builtin.vim b/src/testdir/test_vim9_builtin.vim
index 7dde24c..ac4ca37 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -4497,7 +4497,8 @@
 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