[MacPorts] #67338: py-pyobjc @9.0.1 fails to build on <= 10.13

[MacPorts]

#67338: py-pyobjc @9.0.1 fails to build on <= 10.13
------------------------+------------------------
  Reporter:  jmroot     |      Owner:  danchr
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:  highsierra
      Port:  py-pyobjc  |
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Changes (by ryandesign):

 * keywords:   => highsierra
 * cc: jlg89 (added)


Comment:

 Has duplicate #68332.

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Ticket URL: <https://trac.macports.org/ticket/67338#comment:3>
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