Late 2014 Mac mini multi-core performance

The 32-bit Geekbench results of the late 2014 Mac mini may look rather dull. Especially when you compare it to the Geekbench results of the quad-core 2012 models, but there is something that I noticed when I ran sudo dmesg:

X86PlatformShim::sendPStates – Success!
X86PlatformShim::sendPStates – Success!
X86PlatformShim::sendPStates – Success!
X86PlatformShim::sendPStates – Success!
xcpm: unsupported version
X86PlatformShim::start – Failed to send stepper

That doesn’t look right to me!

I also checked the performance bias MSR 0x1B0 (IA32_ENERGY_PERF_BIAS) which is now set to 1 for maximum performance. Quite normal for desktop hardware, but this MSR is set to 5 on the MacBook Pro models (example).

Power management is now also much more aggressive, because now it banks up from 800 MHz (idle) straight to 2700 MHz. Previously this was done a little less aggressive, because then it went up from 800 MHz (idle) to 1700 MHz. Quite a difference.

The big question now is: Why do I see these errors, and why has Apple missed it?

My guess is that we are going to see a minor update to fix this. Either that, or I didn’t get the right version of Yosemite – though it appears to be using the same version (Build 14A389) of Yosemite already. Anyway. The errors may explain, at least in part, why it is a little slow right now.


The 13-inch MacBook Pro has the same processor (i5-4308U @ 2.80 GHz) and ditto Geekbench results, so don’t expect miracles, but it should run smoother after the errors have been fixed. The new Haswell processor with the Intel® Iris™ Graphics 5100 paired with 802.11ac Wi-Fi and a PCI-based flash drive, makes it a lot more responsive. It also boots up much faster and loads application a lot quicker. Not to mention that it has two Thunderbolt 2 ports (up to 20 Gbps). And all this for the: “We have one other small update today“, which was what Phil Schiller said during the October event.

Sure. There is no quad-core processor option (yet/anymore) and you cannot replace/expand memory yourself, and adding a SSD will void your warranty, but do Apple users really care? I don’t think so, and the people who do want replaceable memory, GPU(s), processor(s), PSU and what not… your Mac is called a hackintosh.

One thought on “Late 2014 Mac mini multi-core performance

  1. Hi.

    I am wondering is it possible to use Macosxbootloader to fool Mac Mini 2014 into booting Mavericks?

    Since Macbook Pro models 2013-14 have same Intel Iris 5100 GPU which is in Mini 2014 and they boot into Mavericks I think it would be possible in theory?

    I looked high and low for Mini 2012 but I couldn’t find one which is why I had to buy Mini 2014. Yosemite is full of bugs and I’m looking a way to get back to solid Mavericks.

    Kind regards, Lauri

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