Become a MacRumors Supporter for $25/year with no ads, private forums, and more!


  1. joelkalsi

    MP 1,1-5,1 Mac Pro 4,1 and a 5th PCI-E connector?

    The airport connector looks like a mini PCI-E connector and it got me thinking has anyone equipped this port with anything other than a wifi/bt card? It may lack a +5V or +12V power pin as there are separate wires for the airport card (which include the antenna, but one of them is for power?)...
  2. R

    MP 1,1-5,1 MP 5,1 Monterey 12.3.1 Update Won’t Finish Booting

    OCLP 0.4.3 and Monterey OtA 12.3.1 update ran and rebooted the machine. After that, boot screen shows, progress bar gets to about 50% and stops. Hard powered off. Powered on again, startup chime, but nothing on screen. Hard powered off. Powered on again, progress bar to 50%, let it sit for about...
  3. JedNZ

    Resolved cMP Parallels 17.1.1 Windows 11 issues

    My cMP is running RefindPlus > OpenCore and I have Legacy Windows 11 installed on a separate SSD in one of the SATA II bays. I successfully upgraded from Windows 10 to Windows 11, and it boots beautifully from the RefindPlus boot screen. I have Parallels 17.1.1 installed and was able to run...
  4. daveyanthony

    MP 1,1-5,1 cMP 5,1 GPU crashing

    Out of nowhere i’ve been experiencing my GPU drivers crashing on the Mojave and Windows sides. Originally I was running an RX 580, then tried switching back to my EFI 7970, which helped a lot in terms of graphical glitches but still constantly crashes the driver. On macOS the rest of the system...
  5. R

    MP 1,1-5,1 cMP 2.1 slower using SSD than HDD

    Hi guys, got a cMP 1.1 for peanuts. It was working decently (and by decently I mean astonishingly fast for a 15 yo computer), booted in 10 seconds, overall workflow was great & snappy. I wouldn't be myself, if I wouldn't try to make things better, so I took an SSD laying around (it was working...
  6. JedNZ

    macOS Big Sur on cMP 5,1

    I was encouraged to share my experience with installing macOS Big Sur on two of my cMPs as I wasn't able to find anything already prescribed for those like me who use the RefindPlus/OpenCore Chainloader, and hopefully it covers off some useful information for others attempting the same. I have...
  7. F

    MP 1,1-5,1 Determine SMC Version of 4,1 / 5,1 Logic Board

    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...
  8. M

    MP 1,1-5,1 Installing Mojave onto a Mac Pro 5,1

    Made a video detailing how I installed Mojave onto my 5,1 CMP:
  9. Surakit Jirasubsakul

    MP 1,1-5,1 Need Help on CMP 5,1 Random Shutdown cause 0

    my Mac Pro 5,1 Randomly shutdown 5 times within 3 hours with error cause 0 which indicate of power power disconnected but the random shutdown happened when i use Final cut pro for other activity is work fine Actually this random shutdown cause happened to me last month then i bring it to the...
  10. B

    MP 1,1-5,1 Latest on cMP and FileVault?

    Hi, I tried to understand the state of things as far as FileVault (aka APFS-Encrypted) on cMP units is concerned. Read some threads here and on MacVidCards' blog, and still confused. I have a MP4,1 updated to 5,1 with a vanilla RX580 and 10.13.6. Considering whether to update to Mojave or...
  11. D

    MP 1,1-5,1 5,1 cMP & GTX 1080

    A friend gave me his unused GTX 1080. I'd like to get it working in my cMP. It seems that Nvidia drivers work up only to 10.13 (I'm on 10.14 at the moment). I'm using this to run Folding@Home applications for COVID19 research. AMD cards (like the RX580 I have) aren't optimized to run...
  12. G

    MP 1,1-5,1 OpenCL vs. Metal with Mojave on cMP 5,1

    I upgraded to a metal-compatible GPU (Radeon RX 580 Pulse) primarily because Mojave requires it and the clock is ticking on High Sierra. Now I'm trying to figure out whether or not to utilize metal or OpenCL for Photoshop, Camera Raw and photo stacking. I found comments on online forums saying...
  13. JedNZ

    Resolved Mac Pro Server (Mid 2012) strange antics powering up

    Just bought another cMP 5,1 Server (Mid 2012) Quad-Core (single CPU). When I first plugged the power cable in it started automatically before I even hit the power button. All good, so I upgraded the firmware from the original 7F to 89, then popped a RX 580 in and upgraded to, but...
  14. Stez

    MP 1,1-5,1 cMP won't boot macOS SSD or HDD

    Hey folks, I'm wondering if someone can help me. I've been struggling for a few days with a grey boot screen when booting my 5.1 (4.1) Mac Pro. I installed Windows in what I thought was legacy mode using VMWare Fusion on macOS using the .vmdk method. Afterwards I could boot into Windows 10...
  15. HaypurTiryading

    MP 1,1-5,1 Clock Generator (PLL) of 4,1-5,1 for Further Overclocking Investigation

    s anyone know clockgenerator (pll) chip/chips of cMP? It should be on cpu tray. I can't access my 4,1 right now but hi-res photos is ok for investigating. I'm looking for further software overclocking possibilities. Also, looking for ram overclocking possibilities and tightening timing options...
  16. rubenSanchez

    MP 1,1-5,1 Vega 64 works better in high sierra than in mojave

    does anyone know what happens? high Sierra Mojave and reference w10
  17. JedNZ

    MP 1,1-5,1 Repairing a damaged cMP casing

    I just bought another cMP 4,1 8-Core (2.26GHz) - Apple 5870 1GB GPU - 22GB - original BT card on an auction site - a steal! It was delivered by a courier company, and my excitement all evaporated as soon as I took the packaging off. F#$kers! Damn!! Bloody criminals. The couriers are...
  18. HaypurTiryading

    MP 1,1-5,1 Is anyone using heatpipe for vrm in 2009 cMP?

    Everyone knows our dusty machines vrm cooling section attached to cooling blocks. When we upgrade 2009 cMP's with 130W lidded CPUs, cooler height increase nearly ~2.2mm. After all, thermal pads should be used 4.5 or 5mm to avoid future overheat problems. Vrms forced extra and cooling solution...
  19. orph

    MP 1,1-5,1 What is safe PSU temps cmp5,1

    Hay in the UK & we have a small heat wave, iv seen my PSU sensor 2 hit 67c+ at default settings. After that iv set the PSU fan to keep the PSU sensor 2 under 50c but at 1400-2000RPM it’s a real pain. 2000RPM and still 49c on PSU sensor 2 ! So is it safe to let it get that hot? Anything I can do...
  20. JedNZ

    MP 1,1-5,1 Apple will recycle my cMP… for free :(

    Charming. Was having a look at Apple's site - just dreaming about the future. And what caught my eye was that I could trade-up a Mac for up to NZ$1400 off. Wow! Must check out what my cMP 4,1 > 5,1 (see my sig for my specs) might get me. And immediately had that sinking feeling. Apple will...