diff --git a/CMakeLists.txt.in b/CMakeLists.txt.in
index 5c7fd65e1..d03b27c4c 100644
--- a/CMakeLists.txt.in
+++ b/CMakeLists.txt.in
@@ -11,9 +11,9 @@
 # CMake-generated project formats that have been tested with this CEF binary
 # distribution include:
 #
-# Linux:      Ninja, Unix Makefiles
-# MacOS:      Ninja, Xcode 8+ (x86_64) or Xcode 12.2+ (ARM64)
-# Windows:    Ninja, Visual Studio 2015+
+# Linux:      Ninja, GCC 7.5.0+, Unix Makefiles
+# MacOS:      Ninja, Xcode 12.2 to 12.5
+# Windows:    Ninja, Visual Studio 2019+
 #
 # Ninja is a cross-platform open-source tool for running fast builds using
 # pre-installed platform toolchains (GNU, clang, Xcode or MSVC). It can be
@@ -39,22 +39,24 @@
 # - CMake version 2.8.12.1 or newer.
 #
 # - Linux requirements:
-#   Currently supported distributions include Debian Wheezy, Ubuntu Precise, and
-#   related. Ubuntu 18.04 64-bit is recommended. Newer versions will likely also
-#   work but may not have been tested.
+#   Currently supported distributions include Debian 10 (Buster), Ubuntu 18
+#   (Bionic Beaver), and related. Ubuntu 18.04 64-bit with GCC 7.5.0+ is
+#   recommended. Newer versions will likely also work but may not have been
+#   tested.
 #   Required packages include:
 #     build-essential
 #     libgtk3.0-dev     (required by the cefclient target only)
 #
 # - MacOS requirements:
-#   Xcode 8 or newer building on MacOS 10.11 (El Capitan) or newer for x86_64.
-#   Xcode 12.2 or newer building on MacOS 10.15.4 (Catalina) or newer for ARM64.
-#   Only 64-bit builds are supported. The Xcode command-line tools must also be
-#   installed.
+#   Xcode 12.2 to 12.5 building on MacOS 10.15.4 (Catalina) or newer. Only
+#   64-bit builds are supported. The Xcode command-line tools must also be
+#   installed. Newer Xcode versions may not have been been tested and are not
+#   recommended.
 #
 # - Windows requirements:
-#   Visual Studio 2015 Update 2 or newer building on Windows 7 or newer. Visual
-#   Studio 2019 and Windows 10 64-bit are recommended.
+#   Visual Studio 2019 or newer building on Windows 7 or newer. Windows 10
+#   64-bit is recommended. Newer versions will likely also work but may not have
+#   been tested.
 #
 # BUILD EXAMPLES
 #