I previously tried "sudo nvram boot-args=debug=0x10", no affect.
Here's the output of "sudo powermetrics -s interrupts". Note the machine model. I don't see any very high interrupts like in the mentioned post.
Machine model: iMac14,3
SMC version: 2.17f7
EFI version: IM143.0118.B07
OS version: 14A389
Boot arguments: debug=0x10
Boot time: Wed Nov 12 20:32:55 2014
*** Sampled system activity (Wed Nov 12 20:39:18 2014 -0500) (5000.57ms elapsed) ***
**** Interrupt distribution ****
CPU 0:
Vector 0x73(XHC1): 1.00 interrupts/sec
Vector 0x75(HDEF): 0.60 interrupts/sec
Vector 0x76(GFX0): 8.60 interrupts/sec
Vector 0x78(SATA): 418.75 interrupts/sec
Vector 0x79(ARPT): 22.00 interrupts/sec
Vector 0x7a(SSD0): 491.34 interrupts/sec
Vector 0xdd(TMR): 219.38 interrupts/sec
Vector 0xde(IPI): 27.80 interrupts/sec
CPU 1:
Vector 0xdd(TMR): 0.40 interrupts/sec
Vector 0xde(IPI): 10.20 interrupts/sec
CPU 2:
Vector 0xdd(TMR): 350.56 interrupts/sec
Vector 0xde(IPI): 20.80 interrupts/sec
CPU 3:
Vector 0xdd(TMR): 0.40 interrupts/sec
Vector 0xde(IPI): 9.40 interrupts/sec
CPU 4:
Vector 0x20(): 0.20 interrupts/sec
Vector 0xdd(TMR): 274.57 interrupts/sec
Vector 0xde(IPI): 20.20 interrupts/sec
CPU 5:
Vector 0xdd(TMR): 0.20 interrupts/sec
Vector 0xde(IPI): 9.00 interrupts/sec
CPU 6:
Vector 0xdd(TMR): 338.76 interrupts/sec
Vector 0xde(IPI): 19.80 interrupts/sec
CPU 7:
Vector 0xde(IPI): 10.60 interrupts/sec
