Rhino 6 Service Release 24 Now Available

Rhino 6 SR24 (6.24.20079) Is now available for Windows and Mac.
Rhino will download and offer to install these updates for you, unless you’ve disabled automatic updates.

Bugs Fixed:

  • Annotation: Text is yellow but not selected after changing Horizontal alignment (RH-56886)
  • Display:
    • Object based conduits reset the object’s draw state by default thereby destroying the state any previous conduits may have set. (RH-57100)
    • Surfaces disappear in Shade command (RH-57140)
    • m_bDrawObject is not restored when set to false in SC_OBJECTCULLING (RH-57332)
  • Export: File IO SKP: Export fails with CM units (RH-56590)
  • File IO: File IO SKP: Can't export (RH-55295)
  • Properties: Dead zones in Layer drop down menu (RH-56902)
  • SDK: Python: SDK Python: Bug in rs.AddHatch() (RH-57120)
  • SDK: RhinoCommon: SDK RhinoCommon: Mesh.Faces.RemoveZeroAreaFaces() removes all faces (RH-56867)
  • Sun: Wrong timezone for Riga and Vilnius at Sun tab (RH-56802)
  • Toolbar: Double RMB-click shouldn't place a text file on the desktop (RH-56996)


  • Match: Keep the point spacing on curve being changed (RH-56957)

Regressions Fixed:

  • Print: Shaded details left out (RH-57310)
  • TextObject: Font=<Name> in macro is not accepted (RH-56801)

SDK Enhancement:

  • SDK: RhinoCommon: SDK RhinoCommon: Expose CRhinoGetPoint::SnapEvent() and CRhinoSnapEvent to RhinoCommon (RH-56769)

Mac-Only Changes

Bugs Fixed:

  • Annotation: Text: Annotation Text: Font issues (RH-56600)
  • Display: Enable Tessellation Shaders on macOS 10.15.4 or later (RH-56985)
  • Grasshopper: File > Recent Files vertical text alignment problems (RH-55339)
  • Preferences: Unhide OpenGL tessellation shader checkbox (RH-57076)

Crashes Fixed:

  • System.NullReferenceException: Object reference not set to an instance of an object (RH-57060)


  • Grasshopper: GrasshopperPluginList: Shows assembly for component in Help (RH-57015)

Features Added:

  • SDK: RhinoCommon:
    • SDK RhinoCommon: Update embedded Mono to (RH-57011)
    • SDK RhinoCommon: Update embedded Xamarin.Mac to (RH-57012)

Performance Improvements:

  • Grasshopper: Opening file takes a long time (RH-56920)

Tasks Completed:

  • Display: OpenGL 3.3: OpenGL: Tessellation Shaders in macOS Catalina 10.15.4 Beta (RH-56984)

Windows-Only Changes

Bugs Fixed:

  • Annotation: Text: Annotation Text: Windows text control doesn't work right with Arial Narrow (RH-56777)
  • Eto: CheckBoxCell requires 3 clicks to set check state under WPF control (RH-56708)

Crashes Fixed:

  • Delete: Delete Command: RhinoCore!CCommandDelete::RunCommand – Access Denied (RH-57086)
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