iFixit - Answers With Device "Mac Pro Late 2013"

Mac Pro Late 2013: Diagnostics LED's meaning in a Mac Pro 2013

Tue, 10 Mar 2026 20:40:24 -0700

Does anyone know the meaning of the various diagnostics LED’s on the 2013 Mac Pro?

⟐ Commented March 10, 2026 at 20:40 MST

Mac Pro Late 2013: Mac Pro 6.1 RAM compatibility

Wed, 04 Mar 2026 07:29:32 -0700

Hello !

I want to update my Mac pro a little

now there is an opportunity to buy DDR3 2400 (as in the picture)

Can you please tell me if I can use such a memory? (factory memory has a lower frequency)

Here is the label

⟐ Answered March 04, 2026 at 7:29 MST

Mac Pro Late 2013: Can you upgrade the GPU?

Tue, 24 Feb 2026 12:32:06 -0700

I'm curious if you can upgrade the GPUs later on. I haven't been able to find any answers, but a lot of people asking.

⟐ Commented February 24, 2026 at 12:32 MST

Mac Pro Late 2013: Seal on inside of lid

Mon, 15 Dec 2025 20:04:29 -0700

I noticed that there is a type of seal running around the inside perimeter of the casing. So when the outer casing slides down onto the main unit, I assume this seal is either to create a cushion for the casing to sit on or its to seal one area of the main unit from another area. Anyway, last time I removed the outer casing, some of this seal was hanging off the casing and was quite brittle and several sections of it came off. Can this be replaced?

Mac Pro Late 2013: Fan - Mac Pro A1481 (Late 2013) pinout

Mon, 06 Oct 2025 12:24:23 -0700

Hello everyone,
This may be a strange question -
does anyone know what the connection for a 4-pin PWM cable for this fan looks like?
I would like to use it in my project, and it must be connected to a standard USB PWM controller.

Thank you in advance for your help and suggestions.

Regards,

Tom

I rushed to find a solution for the overheating MP6.1. I have the impression that OCLP, in combination with newer versions of OSX, which are more demanding in terms of system resources (RAM, CPU, etc.), cause older computers to work harder. I started looking for a solution and, using 3D and an additional original fan from the MP6.1, I achieved quite satisfactory results without the noise of an F-35 taking off. To improve airflow, I removed the original bottom cover, and the second fan is powered by a cheap 4-pin PWM controller. I soldered the cables into the fan's test pins and added a PVC mesh filter between the two original MP 6.1 fan diffusers.. At the moment, such a fan can be bought in the UK for £19, which is quite reasonable. If necessary, I also run TG pro on low settings so as not to drown out my thoughts :) I think that the whole thing doesn't look particularly awful and is quite compact compared to other designs 🤔

⟐ Commented October 06, 2025 at 12:24 MST

Mac Pro Late 2013: PFM006 & PPN001 error in diagnostics

Mon, 25 Aug 2025 10:08:52 -0700

I have an MacPro6,1, the 2013 year model which has the kernel_task going to 900% and fans at full speed. I’ve run the diagnostics tool and it came up with the following two errors:

• PFM006 - There may be an issue with the System Management Controller (SMC)

• PPM001 - There may be an issue with the power management system

The mac powers on fine, but is extremely slow. The SSD is cleared so no software is installed, running from Big Sur from an USB is also really slow.

I’ve opened up the machine and there was a lot of dust. Cleaned out a lot and have put it back together. No change. The water indicators I’ve seen on the boards are not red, hence there is no liquid damage from what I can see. Nor can I see anything weird on the open sides of the boards.

I’ve also done the SMC reset, didn’t help either.

I got the 6 core D500 model with 16gb ram. It also has some HDMI issues from time to time, having the screen flicker (like it’s not getting a propper connection); however using thunderbolt > HDMI works fine.

Does anybody know what I can do to resolve this issue? Do I need to replace the backpanel/PSU, or is there another issue which I can look at?

⟐ Answer edited August 25, 2025 at 10:08 MST

Mac Pro Late 2013: Mac Pro 6,1 is constantly restarting

Tue, 03 Jun 2025 09:30:26 -0700

Hi everyone,

I recently purchased a used 2013 Mac Pro as I've always wanted one, but have since run into some issues. I'm running on the latest version of Monterey, have the 12-Core CPU (original), and it's been upgraded to a 512GB NVME with adapter, along with 64GB of Crucial RAM.

During light to normal use (I'm not what you'd describe as a "Pro" user - the heaviest task i'll do in any given day is editing RAW images in Lightroom) - The computer is just constantly restarting and rebooting to a message saying that it restarted due to an error (shared at the bottom of my post)

Here’s what I’ve tried so far:

SMC reset
PRAM reset
Erased and clean-installed macOS Monterey
Swapped in an original Apple SSD from a Macbook Pro 2015
Brought it to an Apple Store (in Paris), where a RAM-related issue was suspected but no further diagnostic given.
Tried multiple RAM combinations in different slots
Installed new RAM from OWC
Ran extended memory tests overnight (no issues reported)
Used EtreCheck (no major flags)
Ran CPU stress tests (Endurance, Cinebench, Heaven, etc. – all completed without crashing)
Reapplied thermal paste and thoroughly cleaned the machine internally.....

Here is the error report - I've ordered a new CPU and will install it once it arrives as my research as shown that this is the culprit but has anyone else had this same situation and fixed it?

Thank you!!!

---------

"Machine-check capabilities: 0x0000000001000c1d

family: 6 model: 62 stepping: 4 microcode: 1070

signature: 0x306e4

Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz

29 error-reporting banks

Processor 0: IA32_MCG_STATUS: 0x0000000000000005