diff --git a/src/redist/targets/packaging/osx/clisdk/Distribution-Template-x64 b/src/redist/targets/packaging/osx/clisdk/Distribution-Template-x64
index 3e3b3ebda..9a604beb1 100644
--- a/src/redist/targets/packaging/osx/clisdk/Distribution-Template-x64
+++ b/src/redist/targets/packaging/osx/clisdk/Distribution-Template-x64
@@ -85,6 +85,9 @@ function IsX64Machine() {
     system.log("Cpu type: " + cputype);
     system.log("64-bit: " + cpu64);
     
+    // From machine.h
+    // CPU_TYPE_X86_64 = CPU_TYPE_X86 | CPU_ARCH_ABI64 = 0x010000007 = 16777223
+    // CPU_TYPE_X86 = 7
     var result = machine == "amd64" || machine == "x86_64" || cputype == "16777223" || (cputype == "7" && cpu64 == "1");
     system.log("IsX64Machine: " + result);
     return result;