diff --git a/README.md b/README.md
index c29dea1..d343b29 100644
--- a/README.md
+++ b/README.md
@@ -322,7 +322,11 @@ supported.
         -   On macOS Mojave and High Sierra
             -   Select `QEMU HARDDISK Media` (\~103.08GB) from the list
                 and click **Erase**.
-    -   Enter a `Name:` for the disk and click **Erase**.
+    -   Enter a `Name:` for the disk
+    -   If your installing macOS Mojave or later (Catalina, Big Sur,
+        and Monterey), choose any of the APFS options as the filesystem.
+        MacOS Extended may not work.
+    -   Click **Erase**.
     -   Click **Done**.
     -   Close Disk Utility
 -   From **macOS Utilities**