diff --git a/plugins/chksum b/plugins/chksum
index 318f1c8b..06da7995 100755
--- a/plugins/chksum
+++ b/plugins/chksum
@@ -2,6 +2,8 @@
 
 # Description: Create and verify checksums
 #
+# Note:  On macOS, install the relevant checksum packages from Homebrew.
+#
 # Details:
 #   - selection: it will generate one file with the checksums and filenames
 #                (and with paths if they are in another directory)