diff --git a/Library/Homebrew/os/mac.rb b/Library/Homebrew/os/mac.rb
index 8f6a58aaa6..6c20bad598 100644
--- a/Library/Homebrew/os/mac.rb
+++ b/Library/Homebrew/os/mac.rb
@@ -41,21 +41,21 @@ module OS
 
     def latest_sdk_version
       # TODO: bump version when new Xcode macOS SDK is released
-      Version.new "10.15"
+      Version.new "11.0"
     end
 
     def latest_stable_version
       # TODO: bump version when new macOS is released and also update
       # references in docs/Installation.md and
       # https://github.com/Homebrew/install/blob/HEAD/install.sh
-      Version.new "10.15"
+      Version.new "11.0"
     end
 
     def outdated_release?
       # TODO: bump version when new macOS is released and also update
       # references in docs/Installation.md and
       # https://github.com/Homebrew/install/blob/HEAD/install.sh
-      version < "10.13"
+      version < "10.14"
     end
 
     def prerelease?