diff --git a/osx/Dockerfile b/osx/Dockerfile
index 28db7cad8e..eb92d8552b 100644
--- a/osx/Dockerfile
+++ b/osx/Dockerfile
@@ -44,7 +44,7 @@ RUN curl -fsSL -o /boot2docker.iso https://github.com/boot2docker/boot2docker/re
 ENV KITEMATIC_VERSION 0.8.2
 RUN curl -fsSL -o /kitematic.zip https://github.com/kitematic/kitematic/releases/download/v$KITEMATIC_VERSION/Kitematic-$KITEMATIC_VERSION-Mac.zip
 
-ENV INSTALLER_VERSION 1.8.1
+ENV INSTALLER_VERSION 1.8.1a
 
 ENV MIXPANEL_TOKEN c306ae65c33d7d09fe3e546f36493a6e
 
diff --git a/osx/mpkg/Distribution b/osx/mpkg/Distribution
index d355a2429f..ed84ec8e7c 100644
--- a/osx/mpkg/Distribution
+++ b/osx/mpkg/Distribution
@@ -114,7 +114,7 @@
        {
            test = system.version['ProductVersion'];
            system.log("OS version detected: " + test);
-           result = (system.compareVersions(test, '10.9') >= 0);
+           result = (system.compareVersions(test, '10.8') >= 0);
        } catch (e) { system.log(e); result = false; }
 
        if (!result)
diff --git a/osx/mpkg/Resources/en.lproj/Localizable.strings b/osx/mpkg/Resources/en.lproj/Localizable.strings
index cc942113d9..8d7bb9925b 100644
--- a/osx/mpkg/Resources/en.lproj/Localizable.strings
+++ b/osx/mpkg/Resources/en.lproj/Localizable.strings
@@ -28,4 +28,4 @@
 'UNSUPPORTED_HW_MACHINE_MSG' = "The installer has detected an unsupported architecture. VirtualBox only runs on the x86 and amd64 architectures.";
 
 'UNSUPPORTED_OS_TLE' = "Unsupported OS version detected!";
-'UNSUPPORTED_OS_MSG' = "The installer has detected an unsupported operation system. VirtualBox requires Mac OS X 10.6 or later.";
+'UNSUPPORTED_OS_MSG' = "The installer has detected an unsupported operation system. Please upgrade to Mac OS X 10.8 or later.";