4.1

Hi everyone, I've been lurking the forum for a while and now I'm looking for a solution to a problem that seems nobody on the internet has ever solved without replacing the motherboard, which I'd want to avoid as this Mac is a 0 budget project for me. I've recovered it 2 years ago literally from...

I have an old Mac Pro 4,1 workhorse. It has the ATI Radeon HD 4870 PCIe video card, which occupies the lower two of the Mac Pro's four PCI slots. It tends to overheat in the summer and fail, so I'd like to install a Fox 2 exhaust / extractor fan above it. Looks like the intake of the fan will...

Hello everyone, I've been running a very stable setup for years. My 4,1-5,1 Mac Pro has a MacVidCards Vega 64, 64GB of ECC RAM in triple channel and boots to opencore on nvme. There I sometimes choose to boot to Windows 10 on SATA. The nvme has Mojave. Everything was working fine for a long...

Hello All Mac Pro enthusiasts I am in a position when I can finally purchase one of these models. Before I commit, I request some expert advice to support upgrades and development and compatibility with my typical uses. On the Mac side I use my preferred workflow and now some photo editing...

Hi all, my trusty 4,1 (flashed to 5,1) all of a sudden just shut down without being under load and wouldn't properly start up anymore. After it cooled off, it will boot again, but within 5 minutes or so before it just shuts down again. I read the threads about the temperature issues and cleaned...

Hello everyone, I bought a used cMP, which was sold as 5,1 (not working). I have a working 5,1 to swap parts with the broken one. PSU, Processor Board including CPU & RAM, Bluetooth Module, Disk Drives, Hard Drives, GPU and everything works when swapping, except for the Logic Board. The...

Hello, I just got a 2009 cMP 4.1 single CPU with 5.1 firmware flash. I wanted to install a PCIe SSD (AXAGON PCIE-NVME M.2 PCEM2-NC + Samsung 970 EVO). When I pressed the power button, the vents and DVD drive started as usual, but after one or two seconds I could smell a bit of smoke. No boot...

SOLVED via 'Pisla's Mod" It doesn't appear as difficult as it looked at first glance: It consists of using simple taps on 8 long wires, which are routed from the DVD area through the HDD shelf, to the GPU. I'll post any extra details or pictures after I do it ... as I'm sure I"ll find areas...

Hi y’all My Mac Pro 4.1 dual CPU was a swap for my XBox One S. It was purchased direct from Apple UK by my friend who did the swap. He has had it in his photography studio, and it has done light work over it’s life. Anyways; first thing I had to do was put a boot disk in it and re-install...

Hey, i figured out in another thread, that my mac pro 4.1(patched to 5.1) has a EFI based booting problem. Now my hope is to get it back working with an older OS X el capitan version as a boot stick, original cpu etc. and a corresponding flashed EFI Chip ( seen in this thread ). I also saw...

Hi, sorry for the double post, maybe some readers will only get it here Hi everyone, new to this forum. Mac pro 2009 mono cpu (stock mono 2,66) updated to 5.1, high sierra with bootrom MP51.0089.B00 BootROM CPU update fail !! Trying to install a x5675 bought on ebay After cpu change and new...

I have one 2009 4.1 MPc. UPDATED: Machine keeps blowing fuses upon plugging it into socket for power. Once one fuse is blown (or fuse is blown one time) the machine runs just fine. I now did have another look at the problem, and seems that the fuse will blow when cable is put in FIRST time...

Hi, I tried to find some info from here how to power (Mac Pro 4.1-5.1) 1080ti card where is 2x8-pin connector but here wasn't so many conversation about it. So I took risk and ordered EVGA GeForce GTX 1080 Ti FTW3 HYBRID card which is water cooled card. I was thinking to share this if it helps...

What can be wrong on a 4.1 tray? It's only on the CPU B side. It's not the CPU, swapped several times. It's not the memory, swapped as well. With another tray everything is fine. I know this tray has been sitting in a computer who ran hot, it killed the CPU B, replaced it, but something else is...

Hey guys, just wanted to get a post going with some benchmarks and stats for this *updated* build that many of you are probably running now. Here's mine: Mac Pro 2009 4,1 > 5,1 XEON x5680 x2 FW: 140.0.0.0 Mojave on OCZ Vertex4 SSD 256GB Win10 on WD Black NVMe 500GB [Lycom DT-120] Ubuntu...

Do the RX Vega cards need to be flashed to work with the old Mac Pros? I've done a lot of research about Nvidia cards, but I don't really know how it works with the AMD cards. I've seen some stuff about editing kext files. If you do that does it work with the EFI, or would it need to be flashed...

When I boot linux on my Mac Pro 12 core 4.1 -> 5.1 FW update, I get an MCE error. It doesn't prevent the mac from booting but can someone boot linux on an upgraded 4.1 and tell me if they get a similar issue ? Thanks

Hey everyone, so I purchased a 2009 4,1 Mac Pro (Dual x5550) on Craigslist a couple weeks ago for $150. Honestly insane deal for how good of condition it's in. I painlessly flashed it to a 5,1, installed High Sierra, upgraded to 32gb of RAM, and installed a GTX 1070. I've had absolutely no...

Hey Folks, Lets start a discussion and collect everything relevant for cMP upgraders out there. Topics to consider: CPU Upgrades Compatibility chart CPU Delid / standoffs 4,1 to 5,1 firmware upgrade Memory Compatibility and Upgrades UDIMM Model Numbers RDIMM Model Numbers RAM...

I am so sorry if this is in the wrong forum section this is my first time posting. I am buying a Mac Pro 4.1 and asked myself if the Hard Drive Trays from the Mac Pro 1.1 are compatible and fit in the 4.1