diff --git a/README.md b/README.md
index 510847d..9500ef9 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ A default install only requires the user to sit patiently and, less than ten tim
 
 Tested on `bash` and `zsh` on [Cygwin](https://cygwin.com/install.html). Works on macOS, CentOS 7, and Windows. Should work on most modern Linux distros.
 
-macOS Catalina (10.15), Mojave (10.14), and High Sierra (10.13) currently supported. The virtual machine may be upgraded to Big Sur (11.0) through macOS Software Update.
+macOS Catalina (10.15), Mojave (10.14), and High Sierra (10.13) currently supported. The virtual machine may be upgraded to Big Sur 11.0, but Big Sur 11.1 does not boot as of January 2021.
 
 ## Documentation