Update 2 (SSDT):
I added a custom SSDT. Had to download the Beta ssdtPRGen.sh as mentioned in the comments of
Quick Guide to Generate a SSDT for CPU Power Management as the script otherwise was unable to recognize my CPU.
I think the script wasn't able to recognize the CPU because the hardware does not match the iMac14,2 system definition. I was able to generate a SSDT while using the iMac17,1 system definition.
Skylake System Definitions:
Retina 5K, 27-inch, Intel Core i7-6700K 4.0GHz
Mac-65CE76090165799A:iMac17,1
Retina 5K, 27-inch, Intel Core i5-6600 3.3GHz
Mac-B809C3757DA9BB8D:iMac17,1
Retina 5K, 27-inch, Intel Core i5-6500 3.2GHz
Mac-DB15BD556843C820:iMac17,1
Skylake
i7-6700T
i7-6700K
i7-6700
i5-6600T
i5-6600K
i5-6600
i5-6500T
i5-6500
i5-6400T
i5-6400
i3-6320
i3-6300T
i3-6300
i3-6100T
i3-6100
Haswell System Definitions:
Mac-031B6874CF7F642A:iMac14,1
Mac-27ADBB7B4CEE8E61:iMac14,2
Mac-77EB7D7DAF985301:iMac14,3
Mac-81E3E92DD6088272:iMac14,4
Intel Core i5-4690 @ 3.50 GHz
Mac-42FD25EABCABB274:iMac15,1
Intel Core i7-4790K @ 4.0 GHz
Mac-FA842E06C61E91C5:iMac15,1
Mac-189A3D4F975D5FFC:MacBookPro11,1
Mac-3CBD00234E554E41:MacBookPro11,2
Mac-2BD1B31983FE1663:MacBookPro11,3
Mac-06F11FD93F0323C5:MacBookPro11,4
Mac-06F11F11946D27C5:MacBookPro11,5
Mac-35C1E88140C3E6CF:MacBookAir6,1
Mac-7DF21CB3ED6977E5:MacBookAir6,2
Mac-F60DEB81FF30ACF6:MacPro6,1
Mac-35C5E08120C7EEAF:Macmini7,1
Haswell
i7-4770K
i7-4790
i5-4690K
i7-4790K
i5-4430S
i7-4771
i7-4770
i5-4590K
i5-4590
i5-4670K
i5-4670
i5-4570
i5-4440
i5-4440S
i5-4430
i7-4790S
i7-4790T
i7-4785T
i7-4770R
i7-4770S
i7-4770T
i7-4765T
i5-4670R
i5-4690
i5-4690S
i5-4690T
i5-4670S
i5-4670T
i5-4590
i5-4590S
i5-4590T
i5-4570S
i5-4570T
i5-4570TE
i5-4460
i5-4460T
i5-4460S
i3-4130
i3-4130T
i3-4150
i3-4150T
i3-4160
i3-4160T
i3-4330
i3-4330T
i3-4330TE
i3-4340
i3-4340TE
i3-4350
i3-4350T
i3-4360
i3-4360T
i3-4370
Haswell E
i7-5960X
i7-5930K
i7-5820K