[MacPorts] #67759: MoltenVK-1.1.9: extract phase: hdiutil - no mountable file systems on Mac OS X 10.11

[MacPorts]

#67759: MoltenVK-1.1.9: extract phase: hdiutil - no mountable file systems on Mac
OS X 10.11
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  Reporter:  jasonliu--      |      Owner:  Gcenx
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.8.1
Resolution:                  |   Keywords:  elcapitan
      Port:  MoltenVK-1.1.9  |
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Comment (by Gcenx):

 While that would lightly work the issue would then be anyone using a none
 default prefix, I’ve added an older version of MoltenVK before the move to
 APFS format dmg images were used.

 Or we try your solution then add in a following commit a section for OS X
 10.11 to unpacked MoltenVK-1.1.9 package as 10.11 still won’t be able to
 open the dmg but could just reuse the prebuilt package regardless of
 prefix.

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Ticket URL: <https://trac.macports.org/ticket/67759#comment:6>
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