[MacPorts] #59357: Pallet: Build Failure on Catalina 10.15. error: Compiling for earlier than macOS 10.6 is no longer supported. huh?

[MacPorts]

#59357: Pallet: Build Failure on Catalina 10.15. error: Compiling for earlier than
macOS 10.6 is no longer supported. huh?
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  Reporter:  coolbikerdad  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  Pallet        |
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Comment (by kencu):

 on another port that showed the same error, the xib files indicated a
 hardcoded deployment target of 10.5. I just reinplaced that to 10.6 and
 everything worked. Probably could reinplace it to the current build
 systems os version, didn't try.

 I assumed they were made like that by the xcode that generated them, but
 the current ibtool just no longer carries the code to build them in the
 10.5 format, Not that we need them built in that format anyway.

 So that is a very easy thing to try.

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Ticket URL: <https://trac.macports.org/ticket/59357#comment:6>
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