diff --git a/src/proc.sh b/src/proc.sh
index 25c15b0..784a822 100644
--- a/src/proc.sh
+++ b/src/proc.sh
@@ -44,7 +44,7 @@ if [[ "$KVM" != [Nn]* ]]; then
   if [ -n "$KVM_ERR" ]; then
     KVM="N"
     if [[ "$OSTYPE" =~ ^darwin ]]; then
-      warn "you are using MacOS which has no KVM support, this will cause a major loss of performance."
+      warn "you are using macOS which has no KVM support, this will cause a major loss of performance."
     else
       error "KVM acceleration not available $KVM_ERR, this will cause a major loss of performance."
       error "See the FAQ on how to diagnose the cause, or continue without KVM by setting KVM=N (not recommended)."