src/macosx/native/sun/awt/CGraphicsDevice.m

*** 66,75 ****
--- 66,80 ----
          CFRelease(modeString);
          if (thisBpp != bpp || (int)CGDisplayModeGetHeight(cRef) != h || (int)CGDisplayModeGetWidth(cRef) != w) {
              // One of the key parameters does not match
              continue;
          }
+ 
+         if (refrate == 0) { // REFRESH_RATE_UNKNOWN
+             return cRef;
+         }
+ 
          // Refresh rate might be 0 in display mode and we ask for specific display rate
          // but if we do not find exact match then 0 refresh rate might be just Ok
          if (CGDisplayModeGetRefreshRate(cRef) == refrate) {
              // Exact match
              return cRef;