diff --git a/Test/Interactive/rtbCheckNativeDependencies.m b/Test/Interactive/rtbCheckNativeDependencies.m
index 0f387042da5dbf9897f9992380f815a8c1435eba..7d3cb08c6ff947c8f92bfb4bf5220bc3974e6260 100644
--- a/Test/Interactive/rtbCheckNativeDependencies.m
+++ b/Test/Interactive/rtbCheckNativeDependencies.m
@@ -16,8 +16,14 @@ function [status, result, advice] = rtbCheckNativeDependencies()
 
 
 %% Check for OpenEXR library, also known as IlmImf.
+if ismac()
+    % assume homebrew
+    findLibCommand = 'brew list | grep openexr';
+else
+    findLibCommand = 'ldconfig -p | grep libIlmImf';
+end
 openExr = checkSystem('OpenEXR', ...
-    'ldconfig -p | grep libIlmImf', ...
+    findLibCommand, ...
     'It looks like the OpenEXR library is not installed.  Please visit http://www.openexr.com/.  You might also try "sudo apt-get install openexr" or similar.');