diff --git a/README.md b/README.md
index 4e06938..5eefd69 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,8 @@ ODBC support
 
 ## OSX
 
+Note, for MacOS 10.15.4 and newer, 22.3.1 is the earliest version that can be installed through `kerl` (and, therefore, `asdf`). Earlier versions will fail to compile. See [this issue](https://github.com/kerl/kerl/issues/335#issuecomment-605487028) for details.
+
 Install the build tools
 `brew install autoconf`