Selecting the "Browse" button didn't open the browse file dialog but instead it gave error messages:
2016-08-22 15:00:50.875 java[15472:1318674] java.lang.NullPointerException
at org.protege.editor.core.platform.apple.MacUIUtil.lambda$saveFile$12(MacUIUtil.java:56)
at org.protege.editor.core.platform.apple.MacUIUtil$$Lambda$136/1625976788.accept(Unknown Source)
at sun.lwawt.macosx.CFileDialog.queryFilenameFilter(CFileDialog.java:143)
2016-08-22 15:00:50.880 java[15472:1318674] (
0 CoreFoundation 0x00007fff8cf5903c __exceptionPreprocess + 172
1 libobjc.A.dylib 0x00007fff849f376e objc_exception_throw + 43
2 CoreFoundation 0x00007fff8cf58bd9 -[NSException raise] + 9
3 JavaNativeFoundation 0x0000000126214372 JNFCallBooleanMethod + 211
4 libawt_lwawt.dylib 0x00000001293dcdf7 -[CFileDialog askFilenameFilter:] + 88
5 libawt_lwawt.dylib 0x00000001293dcd90 -[CFileDialog panel:shouldEnableURL:] + 156
6 AppKit 0x00007fff8a90db01 -[NSSavePanel _delegateShouldEnableURL:] + 236
7 AppKit 0x00007fff8a90e240 -[NSSavePanel _shouldEnableURL:isDirectoryURLHandler:] + 47
8 AppKit 0x00007fff8a90e3c5 -[NSSavePanel fileBrowser:shouldEnableURL:isDirectory:isPackage:] + 109
9 AppKit 0x00007fff8abb6326 -[NSNavFinderViewFileBrowser finderView:shouldEnableURL:itemIsContainer:itemIsPackage:] + 96
10 FinderKit 0x00007fff8b566f85 -[FIFinderViewGutsController panelDisableNode:] + 166
11 FinderKit 0x00007fff8b5663c0 -[FIFinderViewGutsController nodeIsDimmed:] + 348
12 FinderKit 0x00007fff8b4e9080 -[FI_TListNameCellView updateTagsImageForNode:selected:] + 81
13 FinderKit 0x00007fff8b4f7b10 -[FI_TListViewController outlineView:viewForTableColumn:item:] + 663
14 AppKit 0x00007fff8a4160d0 -[NSTableView(NSTableViewViewBased) makeViewForTableColumn:row:] + 76
15 AppKit 0x00007fff8a415541 -[NSTableRowData _addViewToRowView:atColumn:row:] + 300
16 AppKit 0x00007fff8a41527a -[NSTableRowData _addViewsToRowView:atRow:] + 184
17 AppKit 0x00007fff8a4139ad -[NSTableRowData _initializeRowView:atRow:] + 373
18 AppKit 0x00007fff8a412ad2 -[NSTableRowData _addRowViewForVisibleRow:withPriorView:] + 396
19 AppKit 0x00007fff8a4b29d1 -[NSTableRowData _addRowViewForVisibleRow:withPriorRowIndex:inDictionary:withRowAnimation:] + 254
20 AppKit 0x00007fff8a4b27a3 -[NSTableRowData _unsafeUpdateVisibleRowEntries] + 1856
21 AppKit 0x00007fff8a4b1fc7 -[NSTableRowData updateVisibleRowViews] + 230
22 AppKit 0x00007fff8a4b197d -[NSTableView layout] + 178
23 FinderKit 0x00007fff8b501f09 -[FI_TListView layout] + 162
24 AppKit 0x00007fff8a4420b4 -[NSView _layoutSubtreeWithOldSize:] + 373
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26 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
27 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
28 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
29 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
30 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
31 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
32 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
33 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
34 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
35 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
36 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
37 AppKit 0x00007fff8a442305 -[NSView _layoutSubtreeWithOldSize:] + 966
38 AppKit 0x00007fff8a441d60 -[NSView layoutSubtreeIfNeeded] + 885
39 AppKit 0x00007fff8a4418ba _NSViewLayoutSubtreesThatUseAutolayoutIfNeeded + 71
40 AppKit 0x00007fff8a441841 -[NSWindow(NSConstraintBasedLayout) _layoutViewTree] + 84
41 AppKit 0x00007fff8a460d3d -[NSWindow(NSConstraintBasedLayout) layoutIfNeeded] + 246
42 AppKit 0x00007fff8a30552e _handleWindowNeedsDisplayOrLayoutOrUpdateConstraints + 612
43 AppKit 0x00007fff8aa3b171 __83-[NSWindow _postWindowNeedsDisplayOrLayoutOrUpdateConstraintsUnlessPostingDisabled]_block_invoke1540 + 46
44 CoreFoundation 0x00007fff8ce75127 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
45 CoreFoundation 0x00007fff8ce75080 __CFRunLoopDoObservers + 368
46 CoreFoundation 0x00007fff8ce67188 __CFRunLoopRun + 872
47 CoreFoundation 0x00007fff8ce66bd8 CFRunLoopRunSpecific + 296
48 HIToolbox 0x00007fff8f0a056f RunCurrentEventLoopInMode + 235
49 HIToolbox 0x00007fff8f0a01ee ReceiveNextEventCommon + 179
50 HIToolbox 0x00007fff8f0a012b _BlockUntilNextEventMatchingListInModeWithFilter + 71
51 AppKit 0x00007fff8a3028ab _DPSNextEvent + 978
52 AppKit 0x00007fff8a301e58 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346
53 libosxapp.dylib 0x0000000128e8742a -[NSApplicationAWT nextEventMatchingMask:untilDate:inMode:dequeue:] + 124
54 AppKit 0x00007fff8a4cd887 -[NSApplication _realDoModalLoop:peek:] + 666
55 AppKit 0x00007fff8a4c9e76 -[NSApplication runModalForWindow:] + 119
56 AppKit 0x00007fff8a910a84 -[NSSavePanel runModal] + 323
57 libawt_lwawt.dylib 0x00000001293dcf9f -[CFileDialog safeSaveOrLoad] + 391
58 Foundation 0x00007fff89847dd0 __NSThreadPerformPerform + 293
59 CoreFoundation 0x00007fff8ce75a01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
60 CoreFoundation 0x00007fff8ce67b8d __CFRunLoopDoSources0 + 269
61 CoreFoundation 0x00007fff8ce671bf __CFRunLoopRun + 927
62 CoreFoundation 0x00007fff8ce66bd8 CFRunLoopRunSpecific + 296
63 HIToolbox 0x00007fff8f0a056f RunCurrentEventLoopInMode + 235
64 HIToolbox 0x00007fff8f0a02ea ReceiveNextEventCommon + 431
65 HIToolbox 0x00007fff8f0a012b _BlockUntilNextEventMatchingListInModeWithFilter + 71
66 AppKit 0x00007fff8a3028ab _DPSNextEvent + 978
67 AppKit 0x00007fff8a301e58 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346
68 libosxapp.dylib 0x0000000128e8742a -[NSApplicationAWT nextEventMatchingMask:untilDate:inMode:dequeue:] + 124
69 AppKit 0x00007fff8a2f7af3 -[NSApplication run] + 594
70 libosxapp.dylib 0x0000000128e8723e +[NSApplicationAWT runAWTLoopWithApp:] + 156
71 libawt_lwawt.dylib 0x000000012940a54b -[AWTStarter starter:] + 905
72 Foundation 0x00007fff89847dd0 __NSThreadPerformPerform + 293
73 CoreFoundation 0x00007fff8ce75a01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
74 CoreFoundation 0x00007fff8ce67b8d __CFRunLoopDoSources0 + 269
75 CoreFoundation 0x00007fff8ce671bf __CFRunLoopRun + 927
76 CoreFoundation 0x00007fff8ce66bd8 CFRunLoopRunSpecific + 296
77 java 0x0000000109cd2463 CreateExecutionEnvironment + 871
78 java 0x0000000109cce1ac JLI_Launch + 1952
79 java 0x0000000109cd44c0 main + 101
80 java 0x0000000109ccda04 start + 52
)