add iMac Pro, 10 Core, 2017

[paulz]

sysctl -n machdep.cpu.brand_string
Intel(R) Xeon(R) W-2150B CPU @ 3.00GHz

  Model Name:	iMac Pro
  Model Identifier:	iMacPro1,1
  Processor Name:	10-Core Intel Xeon W
  Processor Speed:	3 GHz
  Number of Processors:	1
  Total Number of Cores:	10
  L2 Cache (per Core):	1 MB
  L3 Cache:	13.8 MB
  Hyper-Threading Technology:	Enabled
  Memory:	64 GB
  Boot ROM Version:	1037.100.362.0.0 (iBridge: 17.16.14281.0.0,0)

Measured time includes build, start simulator, launch the app

[ashfurrow]

Very cool, thanks!