[MacPorts] #67263: supertuxkart @1.4: builds fail for 10.12 and earlier: IOSurface/IOSurfaceRef.h not found

[MacPorts]

#67263: supertuxkart @1.4: builds fail for 10.12 and earlier:
IOSurface/IOSurfaceRef.h not found
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  Reporter:  mascguy       |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:  supertuxkart  |
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Comment (by evanmiller):

 The earliest Mac OS with Metal support is 10.11 – maybe we could get a
 patch working for 10.11/10.12 but likely nothing earlier.

 Supertuxkart 1.3 works fine on my 10.6 machine though. A little laggy at
 times but playable :-)

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Ticket URL: <https://trac.macports.org/ticket/67263#comment:4>
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