diff --git a/doc/todo/Copy-on-Write__47__reflink_support_for_unlocked_files/comment_1_52db92711e28abb0eb7a346646b91573._comment b/doc/todo/Copy-on-Write__47__reflink_support_for_unlocked_files/comment_1_52db92711e28abb0eb7a346646b91573._comment
index ff2d186068..15052ef9d7 100644
--- a/doc/todo/Copy-on-Write__47__reflink_support_for_unlocked_files/comment_1_52db92711e28abb0eb7a346646b91573._comment
+++ b/doc/todo/Copy-on-Write__47__reflink_support_for_unlocked_files/comment_1_52db92711e28abb0eb7a346646b91573._comment
@@ -7,5 +7,7 @@
  content="""
 Oh, nvm, there already seem to be some references in the code to it.
 
-Maybe this should be added under [[https://git-annex.branchable.com/tips/unlocked_files/]]?
+Maybe it should be added that it does that under [[https://git-annex.branchable.com/tips/unlocked_files/]] under using less disk space?
+
+Also, macOS uses a `-c` flag instead of `reflink`, according to [the cp man page](https://www.unix.com/man-page/mojave/1/cp/).
 """]]