Mac-B4831CEBD52A0C4C – two models with a maximum Turbo Boost of 3400 and 4000 MHz. This one uses the exact same processor power management data as the new MacBookPro13,1.
Update: Mac-B4831CEBD52A0C4C.plist removed in 10.12.4 Beta (Build 16E175b).
Mac-CAD6701F7CEA0921 – three models with a maximum Turbo Boost of 3500/3700 and 4000 MHz. This one uses the exact same processor power management data as the new MacBookPro13,2.
Update: Mac-CAD6701F7CEA0921.plist removed in 10.12.4 Beta (Build 16E175b).
Mac-551B86E5744E2388 – three models with a maximum Turbo Boost of 3800/3900 and 4100 MHz. This one uses the exact same processor power management data as the new MacBookPro13,3.
Update: Mac-551B86E5744E2388.plist is still there in 10.12.4 Beta (Build 16E175b).
I checked the perf-bias setting (5) and that suggests that the data is not for Mac desktop models. On desktop models like the iMac perf-bias is set to 1 (highest performance).
Here are the Intel processors that could be used. Some are already known. For the rest of them we have to wait for additional data (scroll down to the update).
3400 MHz
i5-7260U with Intel® Iris™ Plus Graphics 640 (15W)
i5-7287U with Intel® Iris™ Plus Graphics 650 (28W)
3500 MHz
i7-7500U with Intel® HD Graphics 620 (15W)
i5-7267U with Intel® Iris™ Plus Graphics 650 (28W)
i5-7300U withIntel® HD Graphics 620 (15W)
i5-7300HQ with Intel® HD Graphics 630 (45W)
3700 MHz
i5-7287U with Intel® Iris™ Plus Graphics 650 (28W)
3800 MHz
i7-7700HQ with Intel® HD Graphics 630 (45W)
i7-7560U with Intel® Iris™ Plus Graphics 640 (15W)
i5-7440HQ with Intel® HD Graphics 630 (45W)
3900 MHz
i7-7820HQ with Intel® HD Graphics 630 (45W)
4000 MHz
i7-7567U with Intel® Iris™ Plus Graphics 650 (28W)
i7-7660U with Intel® Iris™ Plus Graphics 640 (15W)
4100 MHz
i7-7920HQ with Intel® HD Graphics 630 (45W)
The one with board-id Mac-551B86E5744E2388 is already being checked in ApplePlatformEnabler::probe(IOService*, int*)
There is no GPU data defined as of yet, but this may change at a later date.
Ok. I’m now convinced that the board-id’s that I found are for a series of updated MacBook (Pro) models. One note. The data pointing to faster Intel graphics may also be used for a new Mac mini. Just a wild idea of course 😉 Nope. It was too good to be true. Sorry folks.
Hey. I might be wrong, but when was the last time that I completely missed the boat?
Update: Ok. I figured it out. Let’s start with the MacBookPro13,1
Intel Core i5-6360U 2.0 GHz (max Turbo Boost 3.1 GHz) with Intel® Iris™ Graphics 540 (15W)
Will be replaced by the:
Intel Core i5-7260U 2.2GHz (max Turbo Boost 3.4 GHz) with Intel® Iris™ Plus Graphics 640 (15W)
Update from WWDC17: Apple went for the faster Intel Core i5-7360U 2.3GHz (max Turbo Boost 3.6 GHz) with Intel® Iris™ Plus Graphics 640 (15W). Something I missed because I was away since April.
Intel Core i7-6660U 2.4 GHz (max Turbo Boost 3.4 GHz) with Intel® Iris™ Graphics 540 (15W)
Will be replaced by the:
Intel Core i7-7660U 2.5 GHz (max Turbo Boost 4.0 GHz) with Intel® Iris™ Plus Graphics 640 (15W)
MacBookPro13,2
Intel Core i5-6267U 2.9 GHz (max Turbo Boost 3.3 GHz) with Intel® Iris™ Graphics 550 (28W)
Will be replaced by the:
Intel Core i5-7267U 3.1 GHz (max Turbo Boost 3.5 GHz) with Intel® Iris™ Plus Graphics 650 (28W)
Intel Core i5-6287U 3.1 GHz (max Turbo Boost 3.5 GHz) with Intel® Iris™ Graphics 550 (28W)
Will be replaced by the:
Intel Core i5-7287U 3.3 GHz (max Turbo Boost 3.7 GHz) with Intel® Iris™ Plus Graphics 650 (28W)
Intel Core i7-6567U 3.3 GHz (max Turbo Boost 3.6 GHz) with Intel® Iris™ Graphics 550 (28W)
Will be replaced by the:
Intel Core i7-7567U 3.5 GHz (max Turbo Boost 4.0 GHz) with Intel® Iris™ Plus Graphics 650 (28W)
MacBookPro13,3:
Intel Core i7-6700HQ 2.6 GHz (max Turbo Boost 3.5 GHz) with Intel® HD Graphics 530 (45W)
Will be replaced by the:
Intel Core i7-7700HQ 2.8 GHz (max Turbo Boost 3.8 GHz) with Intel® HD Graphics 630 (45W)
Intel Core i7-6820HQ 2.7 GHz (max Turbo Boost 3.6 GHz) with Intel® HD Graphics 530 (45W)
Will be replaced by the:
Intel Core i7-7820HQ 2.9 GHz (max Turbo Boost 3.9 GHz) with Intel® HD Graphics 630 (45W)
Intel Core i7-6920HQ 2.9 GHz (max Turbo Boost 3.8 GHz) with Intel® HD Graphics 530 (45W)
Will be replaced by the:
Intel Core i7-7920HQ 3.1 GHz (max Turbo Boost 4.1 GHz) with Intel® HD Graphics 630 (45W)
The upgrades will be available some time after the official release of macOS Sierra 10.12.4 at the soonest, but I’d like to stress that I have no idea when exactly the new hardware will be released. It may even be in the summer. Who knows. Seriously. You should not wait for the new hardware. It can take months.
Update: Two of the three plists have since been removed.
Edit: We already have two late 2016 models. One 13-inch MacBook Pro and a 15-inch MacBook Pro, and we will buy a second 13-inch MacBook Pro this weekend. We’re not going to wait for a Kaby Lake model. We need an extra one now. Not whenever Apple decides to upgrade the current models.
Update: I visited the AppleStore today and bought another 13-inch MacBook Pro (with function keys) like I said that I would do. Here is a picture of it on top of the box:

Edit: The data and board-id’s turned out to be 100% accurate, and matched with the new MacBookPro 14[1/2/3] models.