[MacPorts] #63777: py*-tensorflow-metal throws errors on M1 running macOS 11

[MacPorts]

#63777: py*-tensorflow-metal throws errors on M1 running macOS 11
-------------------------------------+-------------------------------------
 Reporter:  essandess                |      Owner:  (none)
     Type:  defect                   |     Status:  new
 Priority:  Normal                   |  Milestone:
Component:  ports                    |    Version:  2.7.1
 Keywords:  arm64 M1 tensorflow      |       Port:  py-tensorflow-metal,
  metal                              |  py-tensorflow-macos
-------------------------------------+-------------------------------------
 {{{py*-tensorflow-metal}}} on macOS 11 M1 systems throws the error on
 basic model training (e.g. https://github.com/macports/macports-
 ports/pull/12678):
 {{{
 MPSGraph
 adamUpdateWithLearningRateTensor:beta1Tensor:beta2Tensor:epsilonTensor:beta1PowerTensor:beta2PowerTensor:valuesTensor:momentumTensor:velocityTensor:maximumVelocityTensor:gradientTensor:name:]:
 unrecognized selector sent to instance
 }}}

 We should limit installation of {{{py*-tensorflow-metal}}} and {{{py
 *-tensorflow-macos}}} to macOS 12+ on {{{arm64}}} devices, per official
 documentation at https://developer.apple.com/metal/tensorflow-plugin/.

 In contrast, {{{py*-tensorflow-metal}}} and {{{py*-tensorflow-macos}}} on
 {{{x86_64}}} devices appears work fine.

 See:
 * https://developer.apple.com/forums/thread/691917
 * https://stackoverflow.com/questions/69511915/getting-error-when-running-
 python-code-on-tensorflow-metal-on-macbook-pro-m1

-- 
Ticket URL: <https://trac.macports.org/ticket/63777>
MacPorts <https://www.macports.org/>
Ports system for macOS