diff --git a/NEWS.md b/NEWS.md
index a8eceb9da..48e10e1df 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -70,7 +70,8 @@
 * MKVToolNix is now using the C++17 library feature "file system library"
   instead of Boost's "file system" and "system" libraries. For the GNU
   Compiler Collection (gcc) libstdc++ this means v8 or newer is required; for
-  clang's libc++ it means v7 or newer.
+  clang's libc++ it means v7 or newer. For macOS this means that only 10.15
+  "Catalina" or newer is supported.
 
 
 # Version 53.0.0 "Fool's Gold" 2021-01-30