From 3537050fbca64838a1d5db47c5fbd17dcdcabf90 Mon Sep 17 00:00:00 2001
From: Josh Klontz <josh@rankone.io>
Date: Tue, 9 Jun 2015 10:50:12 -0400
Subject: [PATCH] don't check DISPLAY on __APPLE__ machines

---
 openbr/openbr_plugin.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/openbr/openbr_plugin.cpp b/openbr/openbr_plugin.cpp
index 791a633..633301e 100644
--- a/openbr/openbr_plugin.cpp
+++ b/openbr/openbr_plugin.cpp
@@ -1072,9 +1072,13 @@ void br::Context::initialize(int &argc, char *argv[], QString sdkPath, bool useG
 
     QString sep;
 #ifndef _WIN32
+  #ifndef __APPLE__
+    // Modern OS X will only define the DISPLAY environment variable if XQuartz
+    // is installed, so we only do this check on non-Apple Unix systems.
     useGui = useGui && (getenv("DISPLAY") != NULL);
+  #endif // __APPLE__
     sep = ":";
-#else
+#else // _WIN32
     sep = ";";
 #endif // not _WIN32
 
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