diff --git a/source/Host/macosx/objcxx/HostInfoMacOSX.mm b/source/Host/macosx/objcxx/HostInfoMacOSX.mm
--- a/source/Host/macosx/objcxx/HostInfoMacOSX.mm
+++ b/source/Host/macosx/objcxx/HostInfoMacOSX.mm
@@ -233,7 +233,7 @@ void HostInfoMacOSX::ComputeHostArchitectureSupport(ArchSpec &arch_32,
     len = sizeof(is_64_bit_capable);
     ::sysctlbyname("hw.cpu64bit_capable", &is_64_bit_capable, &len, NULL, 0);
 
-    if (cputype == CPU_TYPE_ARM64 && cpusubtype == CPU_SUBTYPE_ARM64E) {
+    if (cputype == CPU_TYPE_ARM64 && cpusubtype == ((cpu_subtype_t) 2)) { // CPU_SUBTYPE_ARM64E is not available in the macOS 10.12 headers
       // The arm64e architecture is a preview. Pretend the host architecture
       // is arm64.
       cpusubtype = CPU_SUBTYPE_ARM64_ALL;